hostapd/driver_nl80211.c

   1 /*
   2  * hostapd / Kernel driver communication via nl80211
   3  * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * Alternatively, this software may be distributed under the terms of BSD
  13  * license.
  14  *
  15  * See README and COPYING for more details.
  16  */
  17
  18 #include "includes.h"
  19
  20 #include <sys/ioctl.h>
  21 #include <netlink/genl/genl.h>
  22 #include <netlink/genl/family.h>
  23 #include <netlink/genl/ctrl.h>
  24 #include <netlink/msg.h>
  25 #include <netlink/attr.h>
  26 #include <linux/nl80211.h>
  27 #include <net/if.h>
  28 #include <linux/if_packet.h>
  29 #include <linux/if_ether.h>   /* The L2 protocols */
  30 #include "wireless_copy.h"
  31 #include <net/if_arp.h>
  32
  33 #include "hostapd.h"
  34 #include "driver.h"
  35 #include "ieee802_1x.h"
  36 #include "eloop.h"
  37 #include "ieee802_11.h"
  38 #include "sta_info.h"
  39 #include "hw_features.h"
  40 #include "mlme.h"
  41 #include "radiotap.h"
  42 #include "radiotap_iter.h"
  43
  44 enum ieee80211_msg_type {
  45         ieee80211_msg_normal = 0,
  46         ieee80211_msg_tx_callback_ack = 1,
  47         ieee80211_msg_tx_callback_fail = 2,
  48 };
  49
  50 struct i802_driver_data {
  51         struct hostapd_data *hapd;
  52
  53         char iface[IFNAMSIZ + 1];
  54         int bridge;
  55         int ioctl_sock; /* socket for ioctl() use */
  56         int wext_sock; /* socket for wireless events */
  57         int eapol_sock; /* socket for EAPOL frames */
  58         int monitor_sock; /* socket for monitor */
  59         int monitor_ifidx;
  60
  61         int default_if_indices[16];
  62         int *if_indices;
  63         int num_if_indices;
  64
  65         int we_version;
  66         struct nl_handle *nl_handle;
  67         struct nl_cache *nl_cache;
  68         struct nl_cb *nl_cb;
  69         struct genl_family *nl80211;
  70         int dtim_period, beacon_int;
  71         unsigned int beacon_set:1;
  72         unsigned int ieee802_1x_active:1;
  73 };
  74
  75
  76 static void add_ifidx(struct i802_driver_data *drv, int ifidx)
  77 {
  78         int i;
  79         int *old;
  80
  81         for (i = 0; i < drv->num_if_indices; i++) {
  82                 if (drv->if_indices[i] == 0) {
  83                         drv->if_indices[i] = ifidx;
  84                         return;
  85                 }
  86         }
  87
  88         if (drv->if_indices != drv->default_if_indices)
  89                 old = drv->if_indices;
  90         else
  91                 old = NULL;
  92
  93         drv->if_indices = realloc(old,
  94                                   sizeof(int) * (drv->num_if_indices + 1));
  95         if (!drv->if_indices) {
  96                 if (!old)
  97                         drv->if_indices = drv->default_if_indices;
  98                 else
  99                         drv->if_indices = old;
 100                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
 101                            "interfaces");
 102                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
 103                 return;
 104         }
 105         drv->if_indices[drv->num_if_indices] = ifidx;
 106         drv->num_if_indices++;
 107 }
 108
 109
 110 static void del_ifidx(struct i802_driver_data *drv, int ifidx)
 111 {
 112         int i;
 113
 114         for (i = 0; i < drv->num_if_indices; i++) {
 115                 if (drv->if_indices[i] == ifidx) {
 116                         drv->if_indices[i] = 0;
 117                         break;
 118                 }
 119         }
 120 }
 121
 122
 123 static int have_ifidx(struct i802_driver_data *drv, int ifidx)
 124 {
 125         int i;
 126
 127         if (ifidx == drv->bridge)
 128                 return 1;
 129
 130         for (i = 0; i < drv->num_if_indices; i++)
 131                 if (drv->if_indices[i] == ifidx)
 132                         return 1;
 133
 134         return 0;
 135 }
 136
 137
 138 /* nl80211 code */
 139 static int ack_handler(struct nl_msg *msg, void *arg)
 140 {
 141         int *err = arg;
 142         *err = 0;
 143         return NL_STOP;
 144 }
 145
 146 static int finish_handler(struct nl_msg *msg, void *arg)
 147 {
 148         int *ret = arg;
 149         *ret = 0;
 150         return NL_SKIP;
 151 }
 152
 153 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 154                          void *arg)
 155 {
 156         int *ret = arg;
 157         *ret = err->error;
 158         return NL_SKIP;
 159 }
 160
 161 static int send_and_recv_msgs(struct i802_driver_data *drv,
 162                               struct nl_msg *msg,
 163                               int (*valid_handler)(struct nl_msg *, void *),
 164                               void *valid_data)
 165 {
 166         struct nl_cb *cb;
 167         int err = -ENOMEM;
 168
 169         cb = nl_cb_clone(drv->nl_cb);
 170         if (!cb)
 171                 goto out;
 172
 173         err = nl_send_auto_complete(drv->nl_handle, msg);
 174         if (err < 0)
 175                 goto out;
 176
 177         err = 1;
 178
 179         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 180         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 181         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 182
 183         if (valid_handler)
 184                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 185                           valid_handler, valid_data);
 186
 187         while (err > 0)
 188                 nl_recvmsgs(drv->nl_handle, cb);
 189  out:
 190         nl_cb_put(cb);
 191         nlmsg_free(msg);
 192         return err;
 193 }
 194
 195 static int hostapd_set_iface_flags(struct i802_driver_data *drv,
 196                                    const char *ifname, int dev_up)
 197 {
 198         struct ifreq ifr;
 199
 200         if (drv->ioctl_sock < 0)
 201                 return -1;
 202
 203         memset(&ifr, 0, sizeof(ifr));
 204         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 205
 206         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 207                 perror("ioctl[SIOCGIFFLAGS]");
 208                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 209                            drv->iface);
 210                 return -1;
 211         }
 212
 213         if (dev_up)
 214                 ifr.ifr_flags |= IFF_UP;
 215         else
 216                 ifr.ifr_flags &= ~IFF_UP;
 217
 218         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 219                 perror("ioctl[SIOCSIFFLAGS]");
 220                 return -1;
 221         }
 222
 223         return 0;
 224 }
 225
 226
 227 static int nl_set_encr(int ifindex, struct i802_driver_data *drv,
 228                        const char *alg, const u8 *addr, int idx, const u8 *key,
 229                        size_t key_len, int txkey)
 230 {
 231         struct nl_msg *msg;
 232         int ret;
 233
 234         msg = nlmsg_alloc();
 235         if (!msg)
 236                 return -ENOMEM;
 237
 238         if (strcmp(alg, "none") == 0) {
 239                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 240                             0, NL80211_CMD_DEL_KEY, 0);
 241         } else {
 242                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 243                             0, NL80211_CMD_NEW_KEY, 0);
 244                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
 245                 if (strcmp(alg, "WEP") == 0) {
 246                         if (key_len == 5)
 247                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
 248                                             0x000FAC01);
 249                         else
 250                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
 251                                             0x000FAC05);
 252                 } else if (strcmp(alg, "TKIP") == 0)
 253                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
 254                 else if (strcmp(alg, "CCMP") == 0)
 255                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
 256                 else if (strcmp(alg, "IGTK") == 0)
 257                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
 258                 else {
 259                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
 260                                    "algorithm '%s'", __func__, alg);
 261                         nlmsg_free(msg);
 262                         return -1;
 263                 }
 264         }
 265
 266         if (addr)
 267                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 268         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 269         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
 270
 271         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 272         if (ret == -ENOENT)
 273                 ret = 0;
 274
 275         /*
 276          * If we failed or don't need to set the default TX key (below),
 277          * we're done here.
 278          */
 279         if (ret || !txkey || addr)
 280                 return ret;
 281
 282         msg = nlmsg_alloc();
 283         if (!msg)
 284                 return -ENOMEM;
 285
 286         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 287                     0, NL80211_CMD_SET_KEY, 0);
 288         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 289         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
 290 #ifdef NL80211_MFP_PENDING
 291         if (strcmp(alg, "IGTK") == 0)
 292                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
 293         else
 294                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
 295 #else /* NL80211_MFP_PENDING */
 296         NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
 297 #endif /* NL80211_MFP_PENDING */
 298
 299         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 300         if (ret == -ENOENT)
 301                 ret = 0;
 302         return ret;
 303  nla_put_failure:
 304         return -ENOBUFS;
 305 }
 306
 307
 308 static int i802_set_encryption(const char *iface, void *priv, const char *alg,
 309                                const u8 *addr, int idx, const u8 *key,
 310                                size_t key_len, int txkey)
 311 {
 312         struct i802_driver_data *drv = priv;
 313         int ret;
 314
 315         ret = nl_set_encr(if_nametoindex(iface), drv, alg, addr, idx, key,
 316                           key_len, txkey);
 317         if (ret < 0)
 318                 return ret;
 319
 320         if (strcmp(alg, "IGTK") == 0) {
 321                 ret = nl_set_encr(drv->monitor_ifidx, drv, alg, addr, idx, key,
 322                                   key_len, txkey);
 323         }
 324
 325         return ret;
 326 }
 327
 328
 329 static inline int min_int(int a, int b)
 330 {
 331         if (a < b)
 332                 return a;
 333         return b;
 334 }
 335
 336
 337 static int get_key_handler(struct nl_msg *msg, void *arg)
 338 {
 339         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 340         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 341
 342         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 343                   genlmsg_attrlen(gnlh, 0), NULL);
 344
 345         /*
 346          * TODO: validate the key index and mac address!
 347          * Otherwise, there's a race condition as soon as
 348          * the kernel starts sending key notifications.
 349          */
 350
 351         if (tb[NL80211_ATTR_KEY_SEQ])
 352                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 353                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
 354         return NL_SKIP;
 355 }
 356
 357
 358 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
 359                            int idx, u8 *seq)
 360 {
 361         struct i802_driver_data *drv = priv;
 362         struct nl_msg *msg;
 363
 364         msg = nlmsg_alloc();
 365         if (!msg)
 366                 return -ENOMEM;
 367
 368         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 369                     0, NL80211_CMD_GET_KEY, 0);
 370
 371         if (addr)
 372                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 373         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 374         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
 375
 376         memset(seq, 0, 6);
 377
 378         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
 379  nla_put_failure:
 380         return -ENOBUFS;
 381 }
 382
 383
 384 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
 385                               int mode)
 386 {
 387         return -1;
 388 }
 389
 390
 391 static int i802_set_ssid(const char *ifname, void *priv, const u8 *buf,
 392                          int len)
 393 {
 394         struct i802_driver_data *drv = priv;
 395         struct iwreq iwr;
 396
 397         memset(&iwr, 0, sizeof(iwr));
 398         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
 399         iwr.u.essid.flags = 1; /* SSID active */
 400         iwr.u.essid.pointer = (caddr_t) buf;
 401         iwr.u.essid.length = len;
 402
 403         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 404                 perror("ioctl[SIOCSIWESSID]");
 405                 printf("len=%d\n", len);
 406                 return -1;
 407         }
 408
 409         return 0;
 410 }
 411
 412
 413 static int i802_send_frame(void *priv, const void *data, size_t len,
 414                            int encrypt, int flags)
 415 {
 416         __u8 rtap_hdr[] = {
 417                 0x00, 0x00, /* radiotap version */
 418                 0x0e, 0x00, /* radiotap length */
 419                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
 420                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
 421                 0x00,       /* padding */
 422                 0x00, 0x00, /* RX and TX flags to indicate that */
 423                 0x00, 0x00, /* this is the injected frame directly */
 424         };
 425         struct i802_driver_data *drv = priv;
 426         struct iovec iov[2] = {
 427                 {
 428                         .iov_base = &rtap_hdr,
 429                         .iov_len = sizeof(rtap_hdr),
 430                 },
 431                 {
 432                         .iov_base = (void*)data,
 433                         .iov_len = len,
 434                 }
 435         };
 436         struct msghdr msg = {
 437                 .msg_name = NULL,
 438                 .msg_namelen = 0,
 439                 .msg_iov = iov,
 440                 .msg_iovlen = 2,
 441                 .msg_control = NULL,
 442                 .msg_controllen = 0,
 443                 .msg_flags = 0,
 444         };
 445
 446         if (encrypt)
 447                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
 448
 449         return sendmsg(drv->monitor_sock, &msg, flags);
 450 }
 451
 452 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
 453                                 int flags)
 454 {
 455         return i802_send_frame(priv, data, len, 1, flags);
 456 }
 457
 458 /* Set kernel driver on given frequency (MHz) */
 459 static int i802_set_freq(void *priv, int mode, int freq)
 460 {
 461         struct i802_driver_data *drv = priv;
 462         struct iwreq iwr;
 463
 464         memset(&iwr, 0, sizeof(iwr));
 465         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 466         iwr.u.freq.m = freq;
 467         iwr.u.freq.e = 6;
 468
 469         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 470                 perror("ioctl[SIOCSIWFREQ]");
 471                 return -1;
 472         }
 473
 474         return 0;
 475 }
 476
 477
 478 static int i802_set_rts(void *priv, int rts)
 479 {
 480         struct i802_driver_data *drv = priv;
 481         struct iwreq iwr;
 482
 483         memset(&iwr, 0, sizeof(iwr));
 484         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 485         iwr.u.rts.value = rts;
 486         iwr.u.rts.fixed = 1;
 487
 488         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
 489                 perror("ioctl[SIOCSIWRTS]");
 490                 return -1;
 491         }
 492
 493         return 0;
 494 }
 495
 496
 497 static int i802_get_rts(void *priv, int *rts)
 498 {
 499         struct i802_driver_data *drv = priv;
 500         struct iwreq iwr;
 501
 502         memset(&iwr, 0, sizeof(iwr));
 503         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 504
 505         if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
 506                 perror("ioctl[SIOCGIWRTS]");
 507                 return -1;
 508         }
 509
 510         *rts = iwr.u.rts.value;
 511
 512         return 0;
 513 }
 514
 515
 516 static int i802_set_frag(void *priv, int frag)
 517 {
 518         struct i802_driver_data *drv = priv;
 519         struct iwreq iwr;
 520
 521         memset(&iwr, 0, sizeof(iwr));
 522         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 523         iwr.u.frag.value = frag;
 524         iwr.u.frag.fixed = 1;
 525
 526         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 527                 perror("ioctl[SIOCSIWFRAG]");
 528                 return -1;
 529         }
 530
 531         return 0;
 532 }
 533
 534
 535 static int i802_get_frag(void *priv, int *frag)
 536 {
 537         struct i802_driver_data *drv = priv;
 538         struct iwreq iwr;
 539
 540         memset(&iwr, 0, sizeof(iwr));
 541         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 542
 543         if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
 544                 perror("ioctl[SIOCGIWFRAG]");
 545                 return -1;
 546         }
 547
 548         *frag = iwr.u.frag.value;
 549
 550         return 0;
 551 }
 552
 553
 554 static int i802_set_retry(void *priv, int short_retry, int long_retry)
 555 {
 556         struct i802_driver_data *drv = priv;
 557         struct iwreq iwr;
 558
 559         memset(&iwr, 0, sizeof(iwr));
 560         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 561
 562         iwr.u.retry.value = short_retry;
 563         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 564         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 565                 perror("ioctl[SIOCSIWRETRY(short)]");
 566                 return -1;
 567         }
 568
 569         iwr.u.retry.value = long_retry;
 570         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 571         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 572                 perror("ioctl[SIOCSIWRETRY(long)]");
 573                 return -1;
 574         }
 575
 576         return 0;
 577 }
 578
 579
 580 static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
 581 {
 582         struct i802_driver_data *drv = priv;
 583         struct iwreq iwr;
 584
 585         memset(&iwr, 0, sizeof(iwr));
 586         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 587
 588         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 589         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 590                 perror("ioctl[SIOCGIWFRAG(short)]");
 591                 return -1;
 592         }
 593         *short_retry = iwr.u.retry.value;
 594
 595         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 596         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 597                 perror("ioctl[SIOCGIWFRAG(long)]");
 598                 return -1;
 599         }
 600         *long_retry = iwr.u.retry.value;
 601
 602         return 0;
 603 }
 604
 605
 606 static int i802_flush(void *priv)
 607 {
 608         struct i802_driver_data *drv = priv;
 609         struct nl_msg *msg;
 610
 611         msg = nlmsg_alloc();
 612         if (!msg)
 613                 return -1;
 614
 615         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 616                     0, NL80211_CMD_DEL_STATION, 0);
 617
 618         /*
 619          * XXX: FIX! this needs to flush all VLANs too
 620          */
 621         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 622                     if_nametoindex(drv->iface));
 623
 624         return send_and_recv_msgs(drv, msg, NULL, NULL);
 625  nla_put_failure:
 626         return -ENOBUFS;
 627 }
 628
 629
 630 static int get_sta_handler(struct nl_msg *msg, void *arg)
 631 {
 632         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 633         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 634         struct hostap_sta_driver_data *data = arg;
 635         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
 636         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 637                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
 638                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
 639                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
 640         };
 641
 642         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 643                   genlmsg_attrlen(gnlh, 0), NULL);
 644
 645         /*
 646          * TODO: validate the interface and mac address!
 647          * Otherwise, there's a race condition as soon as
 648          * the kernel starts sending station notifications.
 649          */
 650
 651         if (!tb[NL80211_ATTR_STA_INFO]) {
 652                 wpa_printf(MSG_DEBUG, "sta stats missing!");
 653                 return NL_SKIP;
 654         }
 655         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
 656                              tb[NL80211_ATTR_STA_INFO],
 657                              stats_policy)) {
 658                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
 659                 return NL_SKIP;
 660         }
 661
 662         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
 663                 data->inactive_msec =
 664                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
 665         if (stats[NL80211_STA_INFO_RX_BYTES])
 666                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
 667         if (stats[NL80211_STA_INFO_TX_BYTES])
 668                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
 669
 670         return NL_SKIP;
 671 }
 672
 673 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
 674                               const u8 *addr)
 675 {
 676         struct i802_driver_data *drv = priv;
 677         struct nl_msg *msg;
 678
 679         msg = nlmsg_alloc();
 680         if (!msg)
 681                 return -ENOMEM;
 682
 683         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 684                     0, NL80211_CMD_GET_STATION, 0);
 685
 686         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 687         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 688
 689         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
 690  nla_put_failure:
 691         return -ENOBUFS;
 692 }
 693
 694
 695 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
 696                            size_t data_len, int encrypt, const u8 *own_addr)
 697 {
 698         struct i802_driver_data *drv = priv;
 699         struct ieee80211_hdr *hdr;
 700         size_t len;
 701         u8 *pos;
 702         int res;
 703 #if 0 /* FIX */
 704         int qos = sta->flags & WLAN_STA_WME;
 705 #else
 706         int qos = 0;
 707 #endif
 708
 709         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
 710                 data_len;
 711         hdr = os_zalloc(len);
 712         if (hdr == NULL) {
 713                 printf("malloc() failed for i802_send_data(len=%lu)\n",
 714                        (unsigned long) len);
 715                 return -1;
 716         }
 717
 718         hdr->frame_control =
 719                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 720         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
 721         if (encrypt)
 722                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 723 #if 0 /* To be enabled if qos determination is added above */
 724         if (qos) {
 725                 hdr->frame_control |=
 726                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
 727         }
 728 #endif
 729
 730         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
 731         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
 732         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
 733         pos = (u8 *) (hdr + 1);
 734
 735 #if 0 /* To be enabled if qos determination is added above */
 736         if (qos) {
 737                 /* add an empty QoS header if needed */
 738                 pos[0] = 0;
 739                 pos[1] = 0;
 740                 pos += 2;
 741         }
 742 #endif
 743
 744         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
 745         pos += sizeof(rfc1042_header);
 746         WPA_PUT_BE16(pos, ETH_P_PAE);
 747         pos += 2;
 748         memcpy(pos, data, data_len);
 749
 750         res = i802_send_frame(drv, (u8 *) hdr, len, encrypt, 0);
 751         free(hdr);
 752
 753         if (res < 0) {
 754                 perror("i802_send_eapol: send");
 755                 printf("i802_send_eapol - packet len: %lu - failed\n",
 756                        (unsigned long) len);
 757         }
 758
 759         return res;
 760 }
 761
 762
 763 static int i802_sta_add2(const char *ifname, void *priv,
 764                          struct hostapd_sta_add_params *params)
 765 {
 766         struct i802_driver_data *drv = priv;
 767         struct nl_msg *msg;
 768         int ret = -ENOBUFS;
 769
 770         msg = nlmsg_alloc();
 771         if (!msg)
 772                 return -ENOMEM;
 773
 774         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 775                     0, NL80211_CMD_NEW_STATION, 0);
 776
 777         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 778                     if_nametoindex(drv->iface));
 779         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
 780         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
 781         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
 782                 params->supp_rates);
 783         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
 784                     params->listen_interval);
 785
 786 #ifdef CONFIG_IEEE80211N
 787 #ifdef NL80211_ATTR_HT_CAPABILITY
 788         if (params->ht_capabilities) {
 789                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
 790                         params->ht_capabilities->length,
 791                         &params->ht_capabilities->data);
 792         }
 793 #endif /* NL80211_ATTR_HT_CAPABILITY */
 794 #endif /* CONFIG_IEEE80211N */
 795
 796         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 797         if (ret == -EEXIST)
 798                 ret = 0;
 799  nla_put_failure:
 800         return ret;
 801 }
 802
 803
 804 static int i802_sta_remove(void *priv, const u8 *addr)
 805 {
 806         struct i802_driver_data *drv = priv;
 807         struct nl_msg *msg;
 808         int ret;
 809
 810         msg = nlmsg_alloc();
 811         if (!msg)
 812                 return -ENOMEM;
 813
 814         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 815                     0, NL80211_CMD_DEL_STATION, 0);
 816
 817         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 818                     if_nametoindex(drv->iface));
 819         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 820
 821         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 822         if (ret == -ENOENT)
 823                 return 0;
 824         return ret;
 825  nla_put_failure:
 826         return -ENOBUFS;
 827 }
 828
 829
 830 static int i802_sta_set_flags(void *priv, const u8 *addr,
 831                               int total_flags, int flags_or, int flags_and)
 832 {
 833         struct i802_driver_data *drv = priv;
 834         struct nl_msg *msg, *flags = NULL;
 835
 836         msg = nlmsg_alloc();
 837         if (!msg)
 838                 return -ENOMEM;
 839
 840         flags = nlmsg_alloc();
 841         if (!flags) {
 842                 nlmsg_free(msg);
 843                 return -ENOMEM;
 844         }
 845
 846         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 847                     0, NL80211_CMD_SET_STATION, 0);
 848
 849         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 850                     if_nametoindex(drv->iface));
 851         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 852
 853         if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
 854                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
 855
 856         if (total_flags & WLAN_STA_WME)
 857                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
 858
 859         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
 860                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
 861
 862 #ifdef NL80211_MFP_PENDING
 863         if (total_flags & WLAN_STA_MFP)
 864                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
 865 #endif /* NL80211_MFP_PENDING */
 866
 867         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
 868                 goto nla_put_failure;
 869
 870         nlmsg_free(flags);
 871
 872         return send_and_recv_msgs(drv, msg, NULL, NULL);
 873  nla_put_failure:
 874         nlmsg_free(flags);
 875         return -ENOBUFS;
 876 }
 877
 878
 879 static int i802_set_channel_flag(void *priv, int mode, int chan, int flag,
 880                                  unsigned char power_level,
 881                                  unsigned char antenna_max)
 882 {
 883         return -1;
 884 }
 885
 886
 887 static int i802_set_regulatory_domain(void *priv, unsigned int rd)
 888 {
 889         return -1;
 890 }
 891
 892
 893 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
 894                                     int cw_min, int cw_max, int burst_time)
 895 {
 896         return -1;
 897 }
 898
 899
 900 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
 901 {
 902         struct nl_msg *msg;
 903
 904         /* stop listening for EAPOL on this interface */
 905         del_ifidx(drv, ifidx);
 906
 907         msg = nlmsg_alloc();
 908         if (!msg)
 909                 goto nla_put_failure;
 910
 911         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 912                     0, NL80211_CMD_DEL_INTERFACE, 0);
 913         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
 914
 915         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
 916                 return;
 917  nla_put_failure:
 918         printf("Failed to remove interface.\n");
 919 }
 920
 921
 922 static int nl80211_create_iface(struct i802_driver_data *drv,
 923                                 const char *ifname,
 924                                 enum nl80211_iftype iftype,
 925                                 const u8 *addr)
 926 {
 927         struct nl_msg *msg, *flags = NULL;
 928         int ifidx;
 929         struct ifreq ifreq;
 930         struct iwreq iwr;
 931         int ret = -ENOBUFS;
 932
 933         msg = nlmsg_alloc();
 934         if (!msg)
 935                 return -1;
 936
 937         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 938                     0, NL80211_CMD_NEW_INTERFACE, 0);
 939         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 940                     if_nametoindex(drv->hapd->conf->iface));
 941         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
 942         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
 943
 944         if (iftype == NL80211_IFTYPE_MONITOR) {
 945                 int err;
 946
 947                 flags = nlmsg_alloc();
 948                 if (!flags)
 949                         goto nla_put_failure;
 950
 951                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
 952
 953                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
 954
 955                 nlmsg_free(flags);
 956
 957                 if (err)
 958                         goto nla_put_failure;
 959         }
 960
 961         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 962         if (ret) {
 963  nla_put_failure:
 964                 printf("Failed to create interface %s.\n", ifname);
 965                 return ret;
 966         }
 967
 968         ifidx = if_nametoindex(ifname);
 969
 970         if (ifidx <= 0)
 971                 return -1;
 972
 973         /* start listening for EAPOL on this interface */
 974         add_ifidx(drv, ifidx);
 975
 976         if (addr) {
 977                 switch (iftype) {
 978                 case NL80211_IFTYPE_AP:
 979                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
 980                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 981                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 982
 983                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
 984                                 nl80211_remove_iface(drv, ifidx);
 985                                 return -1;
 986                         }
 987                         break;
 988                 case NL80211_IFTYPE_WDS:
 989                         memset(&iwr, 0, sizeof(iwr));
 990                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
 991                         iwr.u.addr.sa_family = ARPHRD_ETHER;
 992                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
 993                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
 994                                 return -1;
 995                         break;
 996                 default:
 997                         /* nothing */
 998                         break;
 999                 }
1000         }
1001
1002         return ifidx;
1003 }
1004
1005
1006 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1007 {
1008         int ifidx;
1009
1010         /*
1011          * The kernel supports that when the low-level driver does,
1012          * but we currently don't because we need per-BSS data that
1013          * currently we can't handle easily.
1014          */
1015         return -1;
1016
1017         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1018         if (ifidx < 0)
1019                 return -1;
1020         if (hostapd_set_iface_flags(priv, ifname, 1)) {
1021                 nl80211_remove_iface(priv, ifidx);
1022                 return -1;
1023         }
1024         return 0;
1025 }
1026
1027
1028 static int i802_bss_remove(void *priv, const char *ifname)
1029 {
1030         nl80211_remove_iface(priv, if_nametoindex(ifname));
1031         return 0;
1032 }
1033
1034
1035 static int i802_set_beacon(const char *iface, void *priv,
1036                            u8 *head, size_t head_len,
1037                            u8 *tail, size_t tail_len)
1038 {
1039         struct i802_driver_data *drv = priv;
1040         struct nl_msg *msg;
1041         u8 cmd = NL80211_CMD_NEW_BEACON;
1042         int ret;
1043
1044         msg = nlmsg_alloc();
1045         if (!msg)
1046                 return -ENOMEM;
1047
1048         if (drv->beacon_set)
1049                 cmd = NL80211_CMD_SET_BEACON;
1050
1051         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1052                     0, cmd, 0);
1053         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1054         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1055         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1056         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1057
1058         if (!drv->dtim_period)
1059                 drv->dtim_period = 2;
1060         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1061
1062         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1063         if (!ret)
1064                 drv->beacon_set = 1;
1065         return ret;
1066  nla_put_failure:
1067         return -ENOBUFS;
1068 }
1069
1070
1071 static int i802_del_beacon(struct i802_driver_data *drv)
1072 {
1073         struct nl_msg *msg;
1074
1075         msg = nlmsg_alloc();
1076         if (!msg)
1077                 return -ENOMEM;
1078
1079         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1080                     0, NL80211_CMD_DEL_BEACON, 0);
1081         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1082
1083         return send_and_recv_msgs(drv, msg, NULL, NULL);
1084  nla_put_failure:
1085         return -ENOBUFS;
1086 }
1087
1088
1089 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1090 {
1091         struct i802_driver_data *drv = priv;
1092
1093         /*
1094          * FIXME: This needs to be per interface (BSS)
1095          */
1096         drv->ieee802_1x_active = enabled;
1097         return 0;
1098 }
1099
1100
1101 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1102 {
1103         struct i802_driver_data *drv = priv;
1104         struct iwreq iwr;
1105
1106         memset(&iwr, 0, sizeof(iwr));
1107
1108         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1109         iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1110         iwr.u.param.value = enabled;
1111
1112         ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1113
1114         /* ignore errors, the kernel/driver might not care */
1115         return 0;
1116 }
1117
1118
1119 static int i802_set_internal_bridge(void *priv, int value)
1120 {
1121         return -1;
1122 }
1123
1124
1125 static int i802_set_beacon_int(void *priv, int value)
1126 {
1127         struct i802_driver_data *drv = priv;
1128         struct nl_msg *msg;
1129
1130         drv->beacon_int = value;
1131
1132         if (!drv->beacon_set)
1133                 return 0;
1134
1135         msg = nlmsg_alloc();
1136         if (!msg)
1137                 return -ENOMEM;
1138
1139         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1140                     0, NL80211_CMD_SET_BEACON, 0);
1141         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1142
1143         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1144
1145         return send_and_recv_msgs(drv, msg, NULL, NULL);
1146  nla_put_failure:
1147         return -ENOBUFS;
1148 }
1149
1150
1151 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1152 {
1153         struct i802_driver_data *drv = priv;
1154         struct nl_msg *msg;
1155
1156         msg = nlmsg_alloc();
1157         if (!msg)
1158                 return -ENOMEM;
1159
1160         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1161                     0, NL80211_CMD_SET_BEACON, 0);
1162         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1163
1164         drv->dtim_period = value;
1165         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1166
1167         return send_and_recv_msgs(drv, msg, NULL, NULL);
1168  nla_put_failure:
1169         return -ENOBUFS;
1170 }
1171
1172
1173 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
1174 {
1175 #ifdef NL80211_CMD_SET_BSS
1176         struct i802_driver_data *drv = priv;
1177         struct nl_msg *msg;
1178
1179         msg = nlmsg_alloc();
1180         if (!msg)
1181                 return -ENOMEM;
1182
1183         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1184                     NL80211_CMD_SET_BSS, 0);
1185
1186         if (cts >= 0)
1187                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
1188         if (preamble >= 0)
1189                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
1190         if (slot >= 0)
1191                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
1192
1193         /* TODO: multi-BSS support */
1194         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1195
1196         return send_and_recv_msgs(drv, msg, NULL, NULL);
1197  nla_put_failure:
1198         return -ENOBUFS;
1199 #else /* NL80211_CMD_SET_BSS */
1200         return -1;
1201 #endif /* NL80211_CMD_SET_BSS */
1202 }
1203
1204
1205 static int i802_set_cts_protect(void *priv, int value)
1206 {
1207         return i802_set_bss(priv, value, -1, -1);
1208 }
1209
1210
1211 static int i802_set_preamble(void *priv, int value)
1212 {
1213         return i802_set_bss(priv, -1, value, -1);
1214 }
1215
1216
1217 static int i802_set_short_slot_time(void *priv, int value)
1218 {
1219         return i802_set_bss(priv, -1, -1, value);
1220 }
1221
1222
1223 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1224 {
1225         switch (type) {
1226         case HOSTAPD_IF_VLAN:
1227                 return NL80211_IFTYPE_AP_VLAN;
1228         case HOSTAPD_IF_WDS:
1229                 return NL80211_IFTYPE_WDS;
1230         }
1231         return -1;
1232 }
1233
1234
1235 static int i802_if_add(const char *iface, void *priv,
1236                        enum hostapd_driver_if_type type, char *ifname,
1237                        const u8 *addr)
1238 {
1239         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1240                 return -1;
1241         return 0;
1242 }
1243
1244
1245 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1246                           char *ifname, const u8 *addr)
1247 {
1248         /* unused at the moment */
1249         return -1;
1250 }
1251
1252
1253 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1254                           const char *ifname, const u8 *addr)
1255 {
1256         nl80211_remove_iface(priv, if_nametoindex(ifname));
1257         return 0;
1258 }
1259
1260
1261 struct phy_info_arg {
1262         u16 *num_modes;
1263         struct hostapd_hw_modes *modes;
1264 };
1265
1266 static int phy_info_handler(struct nl_msg *msg, void *arg)
1267 {
1268         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1269         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1270         struct phy_info_arg *phy_info = arg;
1271
1272         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1273
1274         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1275         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1276                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1277                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1278                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1279                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1280                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1281         };
1282
1283         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1284         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1285                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1286                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1287         };
1288
1289         struct nlattr *nl_band;
1290         struct nlattr *nl_freq;
1291         struct nlattr *nl_rate;
1292         int rem_band, rem_freq, rem_rate;
1293         struct hostapd_hw_modes *mode;
1294         int idx, mode_is_set;
1295
1296         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1297                   genlmsg_attrlen(gnlh, 0), NULL);
1298
1299         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1300                 return NL_SKIP;
1301
1302         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1303                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1304                 if (!mode)
1305                         return NL_SKIP;
1306                 phy_info->modes = mode;
1307
1308                 mode_is_set = 0;
1309
1310                 mode = &phy_info->modes[*(phy_info->num_modes)];
1311                 memset(mode, 0, sizeof(*mode));
1312                 *(phy_info->num_modes) += 1;
1313
1314                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1315                           nla_len(nl_band), NULL);
1316
1317                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1318                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1319                                   nla_len(nl_freq), freq_policy);
1320                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1321                                 continue;
1322                         mode->num_channels++;
1323                 }
1324
1325                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1326                 if (!mode->channels)
1327                         return NL_SKIP;
1328
1329                 idx = 0;
1330
1331                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1332                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1333                                   nla_len(nl_freq), freq_policy);
1334                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1335                                 continue;
1336
1337                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1338                         mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
1339                                                     HOSTAPD_CHAN_W_ACTIVE_SCAN |
1340                                                     HOSTAPD_CHAN_W_IBSS;
1341
1342                         if (!mode_is_set) {
1343                                 /* crude heuristic */
1344                                 if (mode->channels[idx].freq < 4000)
1345                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1346                                 else
1347                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1348                                 mode_is_set = 1;
1349                         }
1350
1351                         /* crude heuristic */
1352                         if (mode->channels[idx].freq < 4000)
1353                                 if (mode->channels[idx].freq == 2848)
1354                                         mode->channels[idx].chan = 14;
1355                                 else
1356                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1357                         else
1358                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1359
1360                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1361                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
1362                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1363                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
1364                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1365                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
1366                         idx++;
1367                 }
1368
1369                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1370                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1371                                   nla_len(nl_rate), rate_policy);
1372                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1373                                 continue;
1374                         mode->num_rates++;
1375                 }
1376
1377                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1378                 if (!mode->rates)
1379                         return NL_SKIP;
1380
1381                 idx = 0;
1382
1383                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1384                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1385                                   nla_len(nl_rate), rate_policy);
1386                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1387                                 continue;
1388                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1389
1390                         /* crude heuristic */
1391                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1392                             mode->rates[idx].rate > 200)
1393                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1394
1395                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1396                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1397
1398                         idx++;
1399                 }
1400         }
1401
1402         return NL_SKIP;
1403 }
1404
1405 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1406                                                          u16 *num_modes,
1407                                                          u16 *flags)
1408 {
1409         struct i802_driver_data *drv = priv;
1410         struct nl_msg *msg;
1411         struct phy_info_arg result = {
1412                 .num_modes = num_modes,
1413                 .modes = NULL,
1414         };
1415
1416         *num_modes = 0;
1417         *flags = 0;
1418
1419         msg = nlmsg_alloc();
1420         if (!msg)
1421                 return NULL;
1422
1423         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1424                     0, NL80211_CMD_GET_WIPHY, 0);
1425
1426         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1427
1428         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1429                 return result.modes;
1430  nla_put_failure:
1431         return NULL;
1432 }
1433
1434
1435 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1436                              const char *ifname, int vlan_id)
1437 {
1438         struct i802_driver_data *drv = priv;
1439         struct nl_msg *msg;
1440
1441         msg = nlmsg_alloc();
1442         if (!msg)
1443                 return -ENOMEM;
1444
1445         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1446                     0, NL80211_CMD_SET_STATION, 0);
1447
1448         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1449                     if_nametoindex(drv->iface));
1450         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1451         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1452                     if_nametoindex(ifname));
1453
1454         return send_and_recv_msgs(drv, msg, NULL, NULL);
1455  nla_put_failure:
1456         return -ENOBUFS;
1457 }
1458
1459
1460 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1461 {
1462         struct sta_info *sta;
1463
1464         sta = ap_get_sta(hapd, ta);
1465         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1466                 printf("Data/PS-poll frame from not associated STA "
1467                        MACSTR "\n", MAC2STR(ta));
1468                 if (sta && (sta->flags & WLAN_STA_AUTH))
1469                         hostapd_sta_disassoc(
1470                                 hapd, ta,
1471                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1472                 else
1473                         hostapd_sta_deauth(
1474                                 hapd, ta,
1475                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1476         }
1477 }
1478
1479
1480 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1481                                int ok)
1482 {
1483         struct ieee80211_hdr *hdr;
1484         u16 fc, type, stype;
1485         struct sta_info *sta;
1486
1487         hdr = (struct ieee80211_hdr *) buf;
1488         fc = le_to_host16(hdr->frame_control);
1489
1490         type = WLAN_FC_GET_TYPE(fc);
1491         stype = WLAN_FC_GET_STYPE(fc);
1492
1493         switch (type) {
1494         case WLAN_FC_TYPE_MGMT:
1495                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1496                            ok ? "ACK" : "fail");
1497                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1498                 break;
1499         case WLAN_FC_TYPE_CTRL:
1500                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1501                            ok ? "ACK" : "fail");
1502                 break;
1503         case WLAN_FC_TYPE_DATA:
1504                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1505                            ok ? "ACK" : "fail");
1506                 sta = ap_get_sta(hapd, hdr->addr1);
1507                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1508                         wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1509                                    "activity poll", MAC2STR(sta->addr),
1510                                    ok ? "ACKed" : "did not ACK");
1511                         if (ok)
1512                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
1513                 }
1514                 if (sta)
1515                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1516                 break;
1517         default:
1518                 printf("unknown TX callback frame type %d\n", type);
1519                 break;
1520         }
1521 }
1522
1523
1524 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1525                          struct hostapd_frame_info *hfi,
1526                          enum ieee80211_msg_type msg_type)
1527 {
1528         struct ieee80211_hdr *hdr;
1529         u16 fc, type, stype;
1530         size_t data_len = len;
1531         struct hostapd_data *hapd = NULL;
1532         int broadcast_bssid = 0;
1533         size_t i;
1534         u8 *bssid;
1535
1536         /*
1537          * PS-Poll frames are 16 bytes. All other frames are
1538          * 24 bytes or longer.
1539          */
1540         if (len < 16)
1541                 return;
1542
1543         hdr = (struct ieee80211_hdr *) buf;
1544         fc = le_to_host16(hdr->frame_control);
1545
1546         type = WLAN_FC_GET_TYPE(fc);
1547         stype = WLAN_FC_GET_STYPE(fc);
1548
1549         switch (type) {
1550         case WLAN_FC_TYPE_DATA:
1551                 if (len < 24)
1552                         return;
1553                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1554                 case WLAN_FC_TODS:
1555                         bssid = hdr->addr1;
1556                         break;
1557                 default:
1558                         /* discard */
1559                         return;
1560                 }
1561                 break;
1562         case WLAN_FC_TYPE_CTRL:
1563                 /* discard non-ps-poll frames */
1564                 if (stype != WLAN_FC_STYPE_PSPOLL)
1565                         return;
1566                 bssid = hdr->addr1;
1567                 break;
1568         case WLAN_FC_TYPE_MGMT:
1569                 bssid = hdr->addr3;
1570                 break;
1571         default:
1572                 /* discard */
1573                 return;
1574         }
1575
1576         /* find interface frame belongs to */
1577         for (i = 0; i < iface->num_bss; i++) {
1578                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1579                         hapd = iface->bss[i];
1580                         break;
1581                 }
1582         }
1583
1584         if (hapd == NULL) {
1585                 hapd = iface->bss[0];
1586
1587                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1588                     bssid[2] != 0xff || bssid[3] != 0xff ||
1589                     bssid[4] != 0xff || bssid[5] != 0xff) {
1590                         /*
1591                          * Unknown BSSID - drop frame if this is not from
1592                          * passive scanning or a beacon (at least ProbeReq
1593                          * frames to other APs may be allowed through RX
1594                          * filtering in the wlan hw/driver)
1595                          */
1596                         if ((type != WLAN_FC_TYPE_MGMT ||
1597                              stype != WLAN_FC_STYPE_BEACON))
1598                                 return;
1599                 } else
1600                         broadcast_bssid = 1;
1601         }
1602
1603         switch (msg_type) {
1604         case ieee80211_msg_normal:
1605                 /* continue processing */
1606                 break;
1607         case ieee80211_msg_tx_callback_ack:
1608                 handle_tx_callback(hapd, buf, data_len, 1);
1609                 return;
1610         case ieee80211_msg_tx_callback_fail:
1611                 handle_tx_callback(hapd, buf, data_len, 0);
1612                 return;
1613         }
1614
1615         switch (type) {
1616         case WLAN_FC_TYPE_MGMT:
1617                 if (stype != WLAN_FC_STYPE_BEACON &&
1618                     stype != WLAN_FC_STYPE_PROBE_REQ)
1619                         wpa_printf(MSG_MSGDUMP, "MGMT");
1620                 if (broadcast_bssid) {
1621                         for (i = 0; i < iface->num_bss; i++)
1622                                 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1623                                                 stype, hfi);
1624                 } else
1625                         ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1626                 break;
1627         case WLAN_FC_TYPE_CTRL:
1628                 /* can only get here with PS-Poll frames */
1629                 wpa_printf(MSG_DEBUG, "CTRL");
1630                 handle_unknown_sta(hapd, hdr->addr2);
1631                 break;
1632         case WLAN_FC_TYPE_DATA:
1633                 wpa_printf(MSG_DEBUG, "DATA");
1634                 handle_unknown_sta(hapd, hdr->addr2);
1635                 break;
1636         }
1637 }
1638
1639
1640 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1641 {
1642         struct i802_driver_data *drv = eloop_ctx;
1643         struct hostapd_data *hapd = drv->hapd;
1644         struct sockaddr_ll lladdr;
1645         unsigned char buf[3000];
1646         int len;
1647         socklen_t fromlen = sizeof(lladdr);
1648
1649         len = recvfrom(sock, buf, sizeof(buf), 0,
1650                        (struct sockaddr *)&lladdr, &fromlen);
1651         if (len < 0) {
1652                 perror("recv");
1653                 return;
1654         }
1655
1656         if (have_ifidx(drv, lladdr.sll_ifindex))
1657                 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1658 }
1659
1660
1661 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1662 {
1663         struct i802_driver_data *drv = eloop_ctx;
1664         int len;
1665         unsigned char buf[3000];
1666         struct hostapd_data *hapd = drv->hapd;
1667         struct ieee80211_radiotap_iterator iter;
1668         int ret;
1669         struct hostapd_frame_info hfi;
1670         int injected = 0, failed = 0, msg_type, rxflags = 0;
1671
1672         len = recv(sock, buf, sizeof(buf), 0);
1673         if (len < 0) {
1674                 perror("recv");
1675                 return;
1676         }
1677
1678         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1679                 printf("received invalid radiotap frame\n");
1680                 return;
1681         }
1682
1683         memset(&hfi, 0, sizeof(hfi));
1684
1685         while (1) {
1686                 ret = ieee80211_radiotap_iterator_next(&iter);
1687                 if (ret == -ENOENT)
1688                         break;
1689                 if (ret) {
1690                         printf("received invalid radiotap frame (%d)\n", ret);
1691                         return;
1692                 }
1693                 switch (iter.this_arg_index) {
1694                 case IEEE80211_RADIOTAP_FLAGS:
1695                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1696                                 len -= 4;
1697                         break;
1698                 case IEEE80211_RADIOTAP_RX_FLAGS:
1699                         rxflags = 1;
1700                         break;
1701                 case IEEE80211_RADIOTAP_TX_FLAGS:
1702                         injected = 1;
1703                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1704                                         IEEE80211_RADIOTAP_F_TX_FAIL;
1705                         break;
1706                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1707                         break;
1708                 case IEEE80211_RADIOTAP_CHANNEL:
1709                         /* TODO convert from freq/flags to channel number
1710                         hfi.channel = XXX;
1711                         hfi.phytype = XXX;
1712                          */
1713                         break;
1714                 case IEEE80211_RADIOTAP_RATE:
1715                         hfi.datarate = *iter.this_arg * 5;
1716                         break;
1717                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1718                         hfi.ssi_signal = *iter.this_arg;
1719                         break;
1720                 }
1721         }
1722
1723         if (rxflags && injected)
1724                 return;
1725
1726         if (!injected)
1727                 msg_type = ieee80211_msg_normal;
1728         else if (failed)
1729                 msg_type = ieee80211_msg_tx_callback_fail;
1730         else
1731                 msg_type = ieee80211_msg_tx_callback_ack;
1732
1733         handle_frame(hapd->iface, buf + iter.max_length,
1734                      len - iter.max_length, &hfi, msg_type);
1735 }
1736
1737
1738 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1739 {
1740         char buf[IFNAMSIZ];
1741         struct sockaddr_ll ll;
1742         int optval;
1743         socklen_t optlen;
1744
1745         snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1746         buf[IFNAMSIZ - 1] = '\0';
1747
1748         drv->monitor_ifidx =
1749                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1750
1751         if (drv->monitor_ifidx < 0)
1752                 return -1;
1753
1754         if (hostapd_set_iface_flags(drv, buf, 1))
1755                 goto error;
1756
1757         memset(&ll, 0, sizeof(ll));
1758         ll.sll_family = AF_PACKET;
1759         ll.sll_ifindex = drv->monitor_ifidx;
1760         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1761         if (drv->monitor_sock < 0) {
1762                 perror("socket[PF_PACKET,SOCK_RAW]");
1763                 goto error;
1764         }
1765
1766         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1767                  sizeof(ll)) < 0) {
1768                 perror("monitor socket bind");
1769                 goto error;
1770         }
1771
1772         optlen = sizeof(optval);
1773         optval = 20;
1774         if (setsockopt
1775             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1776                 perror("Failed to set socket priority");
1777                 goto error;
1778         }
1779
1780         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1781                                      drv, NULL)) {
1782                 printf("Could not register monitor read socket\n");
1783                 goto error;
1784         }
1785
1786         return 0;
1787  error:
1788         nl80211_remove_iface(drv, drv->monitor_ifidx);
1789         return -1;
1790 }
1791
1792
1793 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1794                                    const char *ifname)
1795 {
1796         struct nl_msg *msg;
1797         int ret = -ENOBUFS;
1798
1799         msg = nlmsg_alloc();
1800         if (!msg)
1801                 return -ENOMEM;
1802
1803         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1804                     0, NL80211_CMD_SET_INTERFACE, 0);
1805         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1806                     if_nametoindex(ifname));
1807         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1808
1809         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1810         if (!ret)
1811                 return 0;
1812  nla_put_failure:
1813         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1814                    "mode.", ifname);
1815         return ret;
1816 }
1817
1818
1819 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1820 {
1821         struct ifreq ifr;
1822         struct sockaddr_ll addr;
1823
1824         drv->ioctl_sock = -1;
1825
1826         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1827         if (drv->ioctl_sock < 0) {
1828                 perror("socket[PF_INET,SOCK_DGRAM]");
1829                 return -1;
1830         }
1831
1832         /* start listening for EAPOL on the default AP interface */
1833         add_ifidx(drv, if_nametoindex(drv->iface));
1834
1835         if (hostapd_set_iface_flags(drv, drv->iface, 0))
1836                 return -1;
1837
1838         if (bssid) {
1839                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1840                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1841                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1842
1843                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1844                         perror("ioctl(SIOCSIFHWADDR)");
1845                         return -1;
1846                 }
1847         }
1848
1849         /*
1850          * initialise generic netlink and nl80211
1851          */
1852         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1853         if (!drv->nl_cb) {
1854                 printf("Failed to allocate netlink callbacks.\n");
1855                 return -1;
1856         }
1857
1858         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1859         if (!drv->nl_handle) {
1860                 printf("Failed to allocate netlink handle.\n");
1861                 return -1;
1862         }
1863
1864         if (genl_connect(drv->nl_handle)) {
1865                 printf("Failed to connect to generic netlink.\n");
1866                 return -1;
1867         }
1868
1869         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1870         if (!drv->nl_cache) {
1871                 printf("Failed to allocate generic netlink cache.\n");
1872                 return -1;
1873         }
1874
1875         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1876         if (!drv->nl80211) {
1877                 printf("nl80211 not found.\n");
1878                 return -1;
1879         }
1880
1881         /* Initialise a monitor interface */
1882         if (nl80211_create_monitor_interface(drv))
1883                 return -1;
1884
1885         if (nl80211_set_master_mode(drv, drv->iface))
1886                 return -1;
1887
1888         if (hostapd_set_iface_flags(drv, drv->iface, 1))
1889                 return -1;
1890
1891         memset(&addr, 0, sizeof(addr));
1892         addr.sll_family = AF_PACKET;
1893         addr.sll_ifindex = ifr.ifr_ifindex;
1894         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
1895                    addr.sll_ifindex);
1896
1897         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
1898         if (drv->eapol_sock < 0) {
1899                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
1900                 return -1;
1901         }
1902
1903         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
1904         {
1905                 printf("Could not register read socket for eapol\n");
1906                 return -1;
1907         }
1908
1909         memset(&ifr, 0, sizeof(ifr));
1910         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
1911         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
1912                 perror("ioctl(SIOCGIFHWADDR)");
1913                 return -1;
1914         }
1915
1916         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
1917                 printf("Invalid HW-addr family 0x%04x\n",
1918                        ifr.ifr_hwaddr.sa_family);
1919                 return -1;
1920         }
1921         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
1922
1923         return 0;
1924 }
1925
1926
1927 static int i802_get_inact_sec(void *priv, const u8 *addr)
1928 {
1929         struct hostap_sta_driver_data data;
1930         int ret;
1931
1932         data.inactive_msec = (unsigned long) -1;
1933         ret = i802_read_sta_data(priv, &data, addr);
1934         if (ret || data.inactive_msec == (unsigned long) -1)
1935                 return -1;
1936         return data.inactive_msec / 1000;
1937 }
1938
1939
1940 static int i802_sta_clear_stats(void *priv, const u8 *addr)
1941 {
1942 #if 0
1943         /* TODO */
1944 #endif
1945         return 0;
1946 }
1947
1948
1949 static void
1950 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
1951                                        char *custom)
1952 {
1953         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
1954
1955         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
1956                 char *pos;
1957                 u8 addr[ETH_ALEN];
1958                 pos = strstr(custom, "addr=");
1959                 if (pos == NULL) {
1960                         wpa_printf(MSG_DEBUG,
1961                                    "MLME-MICHAELMICFAILURE.indication "
1962                                    "without sender address ignored");
1963                         return;
1964                 }
1965                 pos += 5;
1966                 if (hwaddr_aton(pos, addr) == 0) {
1967                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
1968                 } else {
1969                         wpa_printf(MSG_DEBUG,
1970                                    "MLME-MICHAELMICFAILURE.indication "
1971                                    "with invalid MAC address");
1972                 }
1973         }
1974 }
1975
1976
1977 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
1978                                             char *data, int len)
1979 {
1980         struct iw_event iwe_buf, *iwe = &iwe_buf;
1981         char *pos, *end, *custom, *buf;
1982
1983         pos = data;
1984         end = data + len;
1985
1986         while (pos + IW_EV_LCP_LEN <= end) {
1987                 /* Event data may be unaligned, so make a local, aligned copy
1988                  * before processing. */
1989                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
1990                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
1991                            iwe->cmd, iwe->len);
1992                 if (iwe->len <= IW_EV_LCP_LEN)
1993                         return;
1994
1995                 custom = pos + IW_EV_POINT_LEN;
1996                 if (drv->we_version > 18 &&
1997                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
1998                      iwe->cmd == IWEVCUSTOM)) {
1999                         /* WE-19 removed the pointer from struct iw_point */
2000                         char *dpos = (char *) &iwe_buf.u.data.length;
2001                         int dlen = dpos - (char *) &iwe_buf;
2002                         memcpy(dpos, pos + IW_EV_LCP_LEN,
2003                                sizeof(struct iw_event) - dlen);
2004                 } else {
2005                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2006                         custom += IW_EV_POINT_OFF;
2007                 }
2008
2009                 switch (iwe->cmd) {
2010                 case IWEVCUSTOM:
2011                         if (custom + iwe->u.data.length > end)
2012                                 return;
2013                         buf = malloc(iwe->u.data.length + 1);
2014                         if (buf == NULL)
2015                                 return;
2016                         memcpy(buf, custom, iwe->u.data.length);
2017                         buf[iwe->u.data.length] = '\0';
2018                         hostapd_wireless_event_wireless_custom(drv, buf);
2019                         free(buf);
2020                         break;
2021                 }
2022
2023                 pos += iwe->len;
2024         }
2025 }
2026
2027
2028 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2029                                                struct nlmsghdr *h, int len)
2030 {
2031         struct ifinfomsg *ifi;
2032         int attrlen, nlmsg_len, rta_len;
2033         struct rtattr *attr;
2034
2035         if (len < (int) sizeof(*ifi))
2036                 return;
2037
2038         ifi = NLMSG_DATA(h);
2039
2040         /* TODO: use ifi->ifi_index to filter out wireless events from other
2041          * interfaces */
2042
2043         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2044
2045         attrlen = h->nlmsg_len - nlmsg_len;
2046         if (attrlen < 0)
2047                 return;
2048
2049         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2050
2051         rta_len = RTA_ALIGN(sizeof(struct rtattr));
2052         while (RTA_OK(attr, attrlen)) {
2053                 if (attr->rta_type == IFLA_WIRELESS) {
2054                         hostapd_wireless_event_wireless(
2055                                 drv, ((char *) attr) + rta_len,
2056                                 attr->rta_len - rta_len);
2057                 }
2058                 attr = RTA_NEXT(attr, attrlen);
2059         }
2060 }
2061
2062
2063 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2064                                            void *sock_ctx)
2065 {
2066         char buf[256];
2067         int left;
2068         struct sockaddr_nl from;
2069         socklen_t fromlen;
2070         struct nlmsghdr *h;
2071         struct i802_driver_data *drv = eloop_ctx;
2072
2073         fromlen = sizeof(from);
2074         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2075                         (struct sockaddr *) &from, &fromlen);
2076         if (left < 0) {
2077                 if (errno != EINTR && errno != EAGAIN)
2078                         perror("recvfrom(netlink)");
2079                 return;
2080         }
2081
2082         h = (struct nlmsghdr *) buf;
2083         while (left >= (int) sizeof(*h)) {
2084                 int len, plen;
2085
2086                 len = h->nlmsg_len;
2087                 plen = len - sizeof(*h);
2088                 if (len > left || plen < 0) {
2089                         printf("Malformed netlink message: "
2090                                "len=%d left=%d plen=%d\n",
2091                                len, left, plen);
2092                         break;
2093                 }
2094
2095                 switch (h->nlmsg_type) {
2096                 case RTM_NEWLINK:
2097                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
2098                         break;
2099                 }
2100
2101                 len = NLMSG_ALIGN(len);
2102                 left -= len;
2103                 h = (struct nlmsghdr *) ((char *) h + len);
2104         }
2105
2106         if (left > 0) {
2107                 printf("%d extra bytes in the end of netlink message\n", left);
2108         }
2109 }
2110
2111
2112 static int hostap_get_we_version(struct i802_driver_data *drv)
2113 {
2114         struct iw_range *range;
2115         struct iwreq iwr;
2116         int minlen;
2117         size_t buflen;
2118
2119         drv->we_version = 0;
2120
2121         /*
2122          * Use larger buffer than struct iw_range in order to allow the
2123          * structure to grow in the future.
2124          */
2125         buflen = sizeof(struct iw_range) + 500;
2126         range = os_zalloc(buflen);
2127         if (range == NULL)
2128                 return -1;
2129
2130         memset(&iwr, 0, sizeof(iwr));
2131         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2132         iwr.u.data.pointer = (caddr_t) range;
2133         iwr.u.data.length = buflen;
2134
2135         minlen = ((char *) &range->enc_capa) - (char *) range +
2136                 sizeof(range->enc_capa);
2137
2138         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2139                 perror("ioctl[SIOCGIWRANGE]");
2140                 free(range);
2141                 return -1;
2142         } else if (iwr.u.data.length >= minlen &&
2143                    range->we_version_compiled >= 18) {
2144                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2145                            "WE(source)=%d enc_capa=0x%x",
2146                            range->we_version_compiled,
2147                            range->we_version_source,
2148                            range->enc_capa);
2149                 drv->we_version = range->we_version_compiled;
2150         }
2151
2152         free(range);
2153         return 0;
2154 }
2155
2156
2157 static int i802_wireless_event_init(void *priv)
2158 {
2159         struct i802_driver_data *drv = priv;
2160         int s;
2161         struct sockaddr_nl local;
2162
2163         hostap_get_we_version(drv);
2164
2165         drv->wext_sock = -1;
2166
2167         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2168         if (s < 0) {
2169                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2170                 return -1;
2171         }
2172
2173         memset(&local, 0, sizeof(local));
2174         local.nl_family = AF_NETLINK;
2175         local.nl_groups = RTMGRP_LINK;
2176         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2177                 perror("bind(netlink)");
2178                 close(s);
2179                 return -1;
2180         }
2181
2182         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2183                                  NULL);
2184         drv->wext_sock = s;
2185
2186         return 0;
2187 }
2188
2189
2190 static void i802_wireless_event_deinit(void *priv)
2191 {
2192         struct i802_driver_data *drv = priv;
2193         if (drv->wext_sock < 0)
2194                 return;
2195         eloop_unregister_read_sock(drv->wext_sock);
2196         close(drv->wext_sock);
2197 }
2198
2199
2200 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2201 {
2202         struct i802_driver_data *drv = priv;
2203         struct ieee80211_mgmt mgmt;
2204
2205         memset(&mgmt, 0, sizeof(mgmt));
2206         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2207                                           WLAN_FC_STYPE_DEAUTH);
2208         memcpy(mgmt.da, addr, ETH_ALEN);
2209         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2210         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2211         mgmt.u.deauth.reason_code = host_to_le16(reason);
2212         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2213                                       sizeof(mgmt.u.deauth), 0);
2214 }
2215
2216
2217 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2218 {
2219         struct i802_driver_data *drv = priv;
2220         struct ieee80211_mgmt mgmt;
2221
2222         memset(&mgmt, 0, sizeof(mgmt));
2223         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2224                                           WLAN_FC_STYPE_DISASSOC);
2225         memcpy(mgmt.da, addr, ETH_ALEN);
2226         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2227         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2228         mgmt.u.disassoc.reason_code = host_to_le16(reason);
2229         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2230                                        sizeof(mgmt.u.disassoc), 0);
2231 }
2232
2233
2234 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2235 {
2236         struct i802_driver_data *drv;
2237
2238         drv = os_zalloc(sizeof(struct i802_driver_data));
2239         if (drv == NULL) {
2240                 printf("Could not allocate memory for i802 driver data\n");
2241                 return NULL;
2242         }
2243
2244         drv->hapd = hapd;
2245         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2246
2247         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2248         drv->if_indices = drv->default_if_indices;
2249         drv->bridge = if_nametoindex(hapd->conf->bridge);
2250
2251         if (i802_init_sockets(drv, bssid))
2252                 goto failed;
2253
2254         return drv;
2255
2256 failed:
2257         free(drv);
2258         return NULL;
2259 }
2260
2261
2262 static void *i802_init(struct hostapd_data *hapd)
2263 {
2264         return i802_init_bssid(hapd, NULL);
2265 }
2266
2267
2268 static void i802_deinit(void *priv)
2269 {
2270         struct i802_driver_data *drv = priv;
2271
2272         i802_del_beacon(drv);
2273
2274         /* remove monitor interface */
2275         nl80211_remove_iface(drv, drv->monitor_ifidx);
2276
2277         (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2278
2279         if (drv->monitor_sock >= 0) {
2280                 eloop_unregister_read_sock(drv->monitor_sock);
2281                 close(drv->monitor_sock);
2282         }
2283         if (drv->ioctl_sock >= 0)
2284                 close(drv->ioctl_sock);
2285         if (drv->eapol_sock >= 0) {
2286                 eloop_unregister_read_sock(drv->eapol_sock);
2287                 close(drv->eapol_sock);
2288         }
2289
2290         genl_family_put(drv->nl80211);
2291         nl_cache_free(drv->nl_cache);
2292         nl_handle_destroy(drv->nl_handle);
2293         nl_cb_put(drv->nl_cb);
2294
2295         if (drv->if_indices != drv->default_if_indices)
2296                 free(drv->if_indices);
2297
2298         free(drv);
2299 }
2300
2301
2302 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2303         .name = "nl80211",
2304         .init = i802_init,
2305         .init_bssid = i802_init_bssid,
2306         .deinit = i802_deinit,
2307         .wireless_event_init = i802_wireless_event_init,
2308         .wireless_event_deinit = i802_wireless_event_deinit,
2309         .set_ieee8021x = i802_set_ieee8021x,
2310         .set_privacy = i802_set_privacy,
2311         .set_encryption = i802_set_encryption,
2312         .get_seqnum = i802_get_seqnum,
2313         .flush = i802_flush,
2314         .read_sta_data = i802_read_sta_data,
2315         .send_eapol = i802_send_eapol,
2316         .sta_set_flags = i802_sta_set_flags,
2317         .sta_deauth = i802_sta_deauth,
2318         .sta_disassoc = i802_sta_disassoc,
2319         .sta_remove = i802_sta_remove,
2320         .set_ssid = i802_set_ssid,
2321         .send_mgmt_frame = i802_send_mgmt_frame,
2322         .sta_add2 = i802_sta_add2,
2323         .get_inact_sec = i802_get_inact_sec,
2324         .sta_clear_stats = i802_sta_clear_stats,
2325         .set_freq = i802_set_freq,
2326         .set_rts = i802_set_rts,
2327         .get_rts = i802_get_rts,
2328         .set_frag = i802_set_frag,
2329         .get_frag = i802_get_frag,
2330         .set_retry = i802_set_retry,
2331         .get_retry = i802_get_retry,
2332         .set_rate_sets = i802_set_rate_sets,
2333         .set_channel_flag = i802_set_channel_flag,
2334         .set_regulatory_domain = i802_set_regulatory_domain,
2335         .set_beacon = i802_set_beacon,
2336         .set_internal_bridge = i802_set_internal_bridge,
2337         .set_beacon_int = i802_set_beacon_int,
2338         .set_dtim_period = i802_set_dtim_period,
2339         .set_cts_protect = i802_set_cts_protect,
2340         .set_preamble = i802_set_preamble,
2341         .set_short_slot_time = i802_set_short_slot_time,
2342         .set_tx_queue_params = i802_set_tx_queue_params,
2343         .bss_add = i802_bss_add,
2344         .bss_remove = i802_bss_remove,
2345         .if_add = i802_if_add,
2346         .if_update = i802_if_update,
2347         .if_remove = i802_if_remove,
2348         .get_hw_feature_data = i802_get_hw_feature_data,
2349         .set_sta_vlan = i802_set_sta_vlan,
2350 };