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 #ifdef NL80211_ATTR_BSS_BASIC_RATES
 388         struct i802_driver_data *drv = priv;
 389         struct nl_msg *msg;
 390         u8 rates[NL80211_MAX_SUPP_RATES];
 391         u8 rates_len = 0;
 392         int i;
 393
 394         msg = nlmsg_alloc();
 395         if (!msg)
 396                 return -ENOMEM;
 397
 398         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
 399                     NL80211_CMD_SET_BSS, 0);
 400
 401         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
 402                 rates[rates_len++] = basic_rates[i] / 5;
 403
 404         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
 405
 406         /* TODO: multi-BSS support */
 407         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 408
 409         return send_and_recv_msgs(drv, msg, NULL, NULL);
 410  nla_put_failure:
 411         return -ENOBUFS;
 412 #else /* NL80211_ATTR_BSS_BASIC_RATES */
 413         return -1;
 414 #endif /* NL80211_ATTR_BSS_BASIC_RATES */
 415 }
 416
 417
 418 static int i802_set_ssid(const char *ifname, void *priv, const u8 *buf,
 419                          int len)
 420 {
 421         struct i802_driver_data *drv = priv;
 422         struct iwreq iwr;
 423
 424         memset(&iwr, 0, sizeof(iwr));
 425         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
 426         iwr.u.essid.flags = 1; /* SSID active */
 427         iwr.u.essid.pointer = (caddr_t) buf;
 428         iwr.u.essid.length = len;
 429
 430         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 431                 perror("ioctl[SIOCSIWESSID]");
 432                 printf("len=%d\n", len);
 433                 return -1;
 434         }
 435
 436         return 0;
 437 }
 438
 439
 440 static int i802_send_frame(void *priv, const void *data, size_t len,
 441                            int encrypt, int flags)
 442 {
 443         __u8 rtap_hdr[] = {
 444                 0x00, 0x00, /* radiotap version */
 445                 0x0e, 0x00, /* radiotap length */
 446                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
 447                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
 448                 0x00,       /* padding */
 449                 0x00, 0x00, /* RX and TX flags to indicate that */
 450                 0x00, 0x00, /* this is the injected frame directly */
 451         };
 452         struct i802_driver_data *drv = priv;
 453         struct iovec iov[2] = {
 454                 {
 455                         .iov_base = &rtap_hdr,
 456                         .iov_len = sizeof(rtap_hdr),
 457                 },
 458                 {
 459                         .iov_base = (void*)data,
 460                         .iov_len = len,
 461                 }
 462         };
 463         struct msghdr msg = {
 464                 .msg_name = NULL,
 465                 .msg_namelen = 0,
 466                 .msg_iov = iov,
 467                 .msg_iovlen = 2,
 468                 .msg_control = NULL,
 469                 .msg_controllen = 0,
 470                 .msg_flags = 0,
 471         };
 472
 473         if (encrypt)
 474                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
 475
 476         return sendmsg(drv->monitor_sock, &msg, flags);
 477 }
 478
 479 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
 480                                 int flags)
 481 {
 482         return i802_send_frame(priv, data, len, 1, flags);
 483 }
 484
 485 /* Set kernel driver on given frequency (MHz) */
 486 static int i802_set_freq(void *priv, int mode, int freq)
 487 {
 488         struct i802_driver_data *drv = priv;
 489         struct iwreq iwr;
 490
 491         memset(&iwr, 0, sizeof(iwr));
 492         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 493         iwr.u.freq.m = freq;
 494         iwr.u.freq.e = 6;
 495
 496         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 497                 perror("ioctl[SIOCSIWFREQ]");
 498                 return -1;
 499         }
 500
 501         return 0;
 502 }
 503
 504
 505 static int i802_set_rts(void *priv, int rts)
 506 {
 507         struct i802_driver_data *drv = priv;
 508         struct iwreq iwr;
 509
 510         memset(&iwr, 0, sizeof(iwr));
 511         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 512         iwr.u.rts.value = rts;
 513         iwr.u.rts.fixed = 1;
 514
 515         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
 516                 perror("ioctl[SIOCSIWRTS]");
 517                 return -1;
 518         }
 519
 520         return 0;
 521 }
 522
 523
 524 static int i802_get_rts(void *priv, int *rts)
 525 {
 526         struct i802_driver_data *drv = priv;
 527         struct iwreq iwr;
 528
 529         memset(&iwr, 0, sizeof(iwr));
 530         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 531
 532         if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
 533                 perror("ioctl[SIOCGIWRTS]");
 534                 return -1;
 535         }
 536
 537         *rts = iwr.u.rts.value;
 538
 539         return 0;
 540 }
 541
 542
 543 static int i802_set_frag(void *priv, int frag)
 544 {
 545         struct i802_driver_data *drv = priv;
 546         struct iwreq iwr;
 547
 548         memset(&iwr, 0, sizeof(iwr));
 549         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 550         iwr.u.frag.value = frag;
 551         iwr.u.frag.fixed = 1;
 552
 553         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 554                 perror("ioctl[SIOCSIWFRAG]");
 555                 return -1;
 556         }
 557
 558         return 0;
 559 }
 560
 561
 562 static int i802_get_frag(void *priv, int *frag)
 563 {
 564         struct i802_driver_data *drv = priv;
 565         struct iwreq iwr;
 566
 567         memset(&iwr, 0, sizeof(iwr));
 568         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 569
 570         if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
 571                 perror("ioctl[SIOCGIWFRAG]");
 572                 return -1;
 573         }
 574
 575         *frag = iwr.u.frag.value;
 576
 577         return 0;
 578 }
 579
 580
 581 static int i802_set_retry(void *priv, int short_retry, int long_retry)
 582 {
 583         struct i802_driver_data *drv = priv;
 584         struct iwreq iwr;
 585
 586         memset(&iwr, 0, sizeof(iwr));
 587         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 588
 589         iwr.u.retry.value = short_retry;
 590         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 591         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 592                 perror("ioctl[SIOCSIWRETRY(short)]");
 593                 return -1;
 594         }
 595
 596         iwr.u.retry.value = long_retry;
 597         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 598         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 599                 perror("ioctl[SIOCSIWRETRY(long)]");
 600                 return -1;
 601         }
 602
 603         return 0;
 604 }
 605
 606
 607 static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
 608 {
 609         struct i802_driver_data *drv = priv;
 610         struct iwreq iwr;
 611
 612         memset(&iwr, 0, sizeof(iwr));
 613         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 614
 615         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 616         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 617                 perror("ioctl[SIOCGIWFRAG(short)]");
 618                 return -1;
 619         }
 620         *short_retry = iwr.u.retry.value;
 621
 622         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 623         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 624                 perror("ioctl[SIOCGIWFRAG(long)]");
 625                 return -1;
 626         }
 627         *long_retry = iwr.u.retry.value;
 628
 629         return 0;
 630 }
 631
 632
 633 static int i802_flush(void *priv)
 634 {
 635         struct i802_driver_data *drv = priv;
 636         struct nl_msg *msg;
 637
 638         msg = nlmsg_alloc();
 639         if (!msg)
 640                 return -1;
 641
 642         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 643                     0, NL80211_CMD_DEL_STATION, 0);
 644
 645         /*
 646          * XXX: FIX! this needs to flush all VLANs too
 647          */
 648         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 649                     if_nametoindex(drv->iface));
 650
 651         return send_and_recv_msgs(drv, msg, NULL, NULL);
 652  nla_put_failure:
 653         return -ENOBUFS;
 654 }
 655
 656
 657 static int get_sta_handler(struct nl_msg *msg, void *arg)
 658 {
 659         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 660         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 661         struct hostap_sta_driver_data *data = arg;
 662         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
 663         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 664                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
 665                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
 666                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
 667         };
 668
 669         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 670                   genlmsg_attrlen(gnlh, 0), NULL);
 671
 672         /*
 673          * TODO: validate the interface and mac address!
 674          * Otherwise, there's a race condition as soon as
 675          * the kernel starts sending station notifications.
 676          */
 677
 678         if (!tb[NL80211_ATTR_STA_INFO]) {
 679                 wpa_printf(MSG_DEBUG, "sta stats missing!");
 680                 return NL_SKIP;
 681         }
 682         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
 683                              tb[NL80211_ATTR_STA_INFO],
 684                              stats_policy)) {
 685                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
 686                 return NL_SKIP;
 687         }
 688
 689         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
 690                 data->inactive_msec =
 691                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
 692         if (stats[NL80211_STA_INFO_RX_BYTES])
 693                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
 694         if (stats[NL80211_STA_INFO_TX_BYTES])
 695                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
 696
 697         return NL_SKIP;
 698 }
 699
 700 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
 701                               const u8 *addr)
 702 {
 703         struct i802_driver_data *drv = priv;
 704         struct nl_msg *msg;
 705
 706         msg = nlmsg_alloc();
 707         if (!msg)
 708                 return -ENOMEM;
 709
 710         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 711                     0, NL80211_CMD_GET_STATION, 0);
 712
 713         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 714         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 715
 716         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
 717  nla_put_failure:
 718         return -ENOBUFS;
 719 }
 720
 721
 722 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
 723                            size_t data_len, int encrypt, const u8 *own_addr)
 724 {
 725         struct i802_driver_data *drv = priv;
 726         struct ieee80211_hdr *hdr;
 727         size_t len;
 728         u8 *pos;
 729         int res;
 730 #if 0 /* FIX */
 731         int qos = sta->flags & WLAN_STA_WME;
 732 #else
 733         int qos = 0;
 734 #endif
 735
 736         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
 737                 data_len;
 738         hdr = os_zalloc(len);
 739         if (hdr == NULL) {
 740                 printf("malloc() failed for i802_send_data(len=%lu)\n",
 741                        (unsigned long) len);
 742                 return -1;
 743         }
 744
 745         hdr->frame_control =
 746                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 747         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
 748         if (encrypt)
 749                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 750 #if 0 /* To be enabled if qos determination is added above */
 751         if (qos) {
 752                 hdr->frame_control |=
 753                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
 754         }
 755 #endif
 756
 757         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
 758         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
 759         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
 760         pos = (u8 *) (hdr + 1);
 761
 762 #if 0 /* To be enabled if qos determination is added above */
 763         if (qos) {
 764                 /* add an empty QoS header if needed */
 765                 pos[0] = 0;
 766                 pos[1] = 0;
 767                 pos += 2;
 768         }
 769 #endif
 770
 771         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
 772         pos += sizeof(rfc1042_header);
 773         WPA_PUT_BE16(pos, ETH_P_PAE);
 774         pos += 2;
 775         memcpy(pos, data, data_len);
 776
 777         res = i802_send_frame(drv, (u8 *) hdr, len, encrypt, 0);
 778         free(hdr);
 779
 780         if (res < 0) {
 781                 perror("i802_send_eapol: send");
 782                 printf("i802_send_eapol - packet len: %lu - failed\n",
 783                        (unsigned long) len);
 784         }
 785
 786         return res;
 787 }
 788
 789
 790 static int i802_sta_add2(const char *ifname, void *priv,
 791                          struct hostapd_sta_add_params *params)
 792 {
 793         struct i802_driver_data *drv = priv;
 794         struct nl_msg *msg;
 795         int ret = -ENOBUFS;
 796
 797         msg = nlmsg_alloc();
 798         if (!msg)
 799                 return -ENOMEM;
 800
 801         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 802                     0, NL80211_CMD_NEW_STATION, 0);
 803
 804         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 805                     if_nametoindex(drv->iface));
 806         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
 807         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
 808         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
 809                 params->supp_rates);
 810         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
 811                     params->listen_interval);
 812
 813 #ifdef CONFIG_IEEE80211N
 814 #ifdef NL80211_ATTR_HT_CAPABILITY
 815         if (params->ht_capabilities) {
 816                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
 817                         params->ht_capabilities->length,
 818                         &params->ht_capabilities->data);
 819         }
 820 #endif /* NL80211_ATTR_HT_CAPABILITY */
 821 #endif /* CONFIG_IEEE80211N */
 822
 823         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 824         if (ret == -EEXIST)
 825                 ret = 0;
 826  nla_put_failure:
 827         return ret;
 828 }
 829
 830
 831 static int i802_sta_remove(void *priv, const u8 *addr)
 832 {
 833         struct i802_driver_data *drv = priv;
 834         struct nl_msg *msg;
 835         int ret;
 836
 837         msg = nlmsg_alloc();
 838         if (!msg)
 839                 return -ENOMEM;
 840
 841         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 842                     0, NL80211_CMD_DEL_STATION, 0);
 843
 844         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 845                     if_nametoindex(drv->iface));
 846         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 847
 848         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 849         if (ret == -ENOENT)
 850                 return 0;
 851         return ret;
 852  nla_put_failure:
 853         return -ENOBUFS;
 854 }
 855
 856
 857 static int i802_sta_set_flags(void *priv, const u8 *addr,
 858                               int total_flags, int flags_or, int flags_and)
 859 {
 860         struct i802_driver_data *drv = priv;
 861         struct nl_msg *msg, *flags = NULL;
 862
 863         msg = nlmsg_alloc();
 864         if (!msg)
 865                 return -ENOMEM;
 866
 867         flags = nlmsg_alloc();
 868         if (!flags) {
 869                 nlmsg_free(msg);
 870                 return -ENOMEM;
 871         }
 872
 873         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 874                     0, NL80211_CMD_SET_STATION, 0);
 875
 876         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 877                     if_nametoindex(drv->iface));
 878         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 879
 880         if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
 881                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
 882
 883         if (total_flags & WLAN_STA_WME)
 884                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
 885
 886         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
 887                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
 888
 889 #ifdef NL80211_MFP_PENDING
 890         if (total_flags & WLAN_STA_MFP)
 891                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
 892 #endif /* NL80211_MFP_PENDING */
 893
 894         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
 895                 goto nla_put_failure;
 896
 897         nlmsg_free(flags);
 898
 899         return send_and_recv_msgs(drv, msg, NULL, NULL);
 900  nla_put_failure:
 901         nlmsg_free(flags);
 902         return -ENOBUFS;
 903 }
 904
 905
 906 static int i802_set_channel_flag(void *priv, int mode, int chan, int flag,
 907                                  unsigned char power_level,
 908                                  unsigned char antenna_max)
 909 {
 910         return -1;
 911 }
 912
 913
 914 static int i802_set_regulatory_domain(void *priv, unsigned int rd)
 915 {
 916         return -1;
 917 }
 918
 919
 920 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
 921                                     int cw_min, int cw_max, int burst_time)
 922 {
 923 #ifdef NL80211_ATTR_WIPHY_TXQ_PARAMS
 924         struct i802_driver_data *drv = priv;
 925         struct nl_msg *msg;
 926         struct nlattr *txq, *params;
 927
 928         msg = nlmsg_alloc();
 929         if (!msg)
 930                 return -1;
 931
 932         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 933                     0, NL80211_CMD_SET_WIPHY, 0);
 934
 935         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 936
 937         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
 938         if (!txq)
 939                 goto nla_put_failure;
 940
 941         /* We are only sending parameters for a single TXQ at a time */
 942         params = nla_nest_start(msg, 1);
 943         if (!params)
 944                 goto nla_put_failure;
 945
 946         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
 947         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
 948          * 32 usec, so need to convert the value here. */
 949         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
 950         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
 951         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
 952         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
 953
 954         nla_nest_end(msg, params);
 955
 956         nla_nest_end(msg, txq);
 957
 958         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
 959                 return 0;
 960  nla_put_failure:
 961         return -1;
 962 #else /* NL80211_ATTR_WIPHY_TXQ_PARAMS */
 963         return -1;
 964 #endif /* NL80211_ATTR_WIPHY_TXQ_PARAMS */
 965 }
 966
 967
 968 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
 969 {
 970         struct nl_msg *msg;
 971
 972         /* stop listening for EAPOL on this interface */
 973         del_ifidx(drv, ifidx);
 974
 975         msg = nlmsg_alloc();
 976         if (!msg)
 977                 goto nla_put_failure;
 978
 979         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 980                     0, NL80211_CMD_DEL_INTERFACE, 0);
 981         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
 982
 983         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
 984                 return;
 985  nla_put_failure:
 986         printf("Failed to remove interface.\n");
 987 }
 988
 989
 990 static int nl80211_create_iface(struct i802_driver_data *drv,
 991                                 const char *ifname,
 992                                 enum nl80211_iftype iftype,
 993                                 const u8 *addr)
 994 {
 995         struct nl_msg *msg, *flags = NULL;
 996         int ifidx;
 997         struct ifreq ifreq;
 998         struct iwreq iwr;
 999         int ret = -ENOBUFS;
1000
1001         msg = nlmsg_alloc();
1002         if (!msg)
1003                 return -1;
1004
1005         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1006                     0, NL80211_CMD_NEW_INTERFACE, 0);
1007         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1008                     if_nametoindex(drv->hapd->conf->iface));
1009         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
1010         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
1011
1012         if (iftype == NL80211_IFTYPE_MONITOR) {
1013                 int err;
1014
1015                 flags = nlmsg_alloc();
1016                 if (!flags)
1017                         goto nla_put_failure;
1018
1019                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
1020
1021                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1022
1023                 nlmsg_free(flags);
1024
1025                 if (err)
1026                         goto nla_put_failure;
1027         }
1028
1029         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1030         if (ret) {
1031  nla_put_failure:
1032                 printf("Failed to create interface %s.\n", ifname);
1033                 return ret;
1034         }
1035
1036         ifidx = if_nametoindex(ifname);
1037
1038         if (ifidx <= 0)
1039                 return -1;
1040
1041         /* start listening for EAPOL on this interface */
1042         add_ifidx(drv, ifidx);
1043
1044         if (addr) {
1045                 switch (iftype) {
1046                 case NL80211_IFTYPE_AP:
1047                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
1048                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
1049                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1050
1051                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
1052                                 nl80211_remove_iface(drv, ifidx);
1053                                 return -1;
1054                         }
1055                         break;
1056                 case NL80211_IFTYPE_WDS:
1057                         memset(&iwr, 0, sizeof(iwr));
1058                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1059                         iwr.u.addr.sa_family = ARPHRD_ETHER;
1060                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
1061                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
1062                                 return -1;
1063                         break;
1064                 default:
1065                         /* nothing */
1066                         break;
1067                 }
1068         }
1069
1070         return ifidx;
1071 }
1072
1073
1074 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1075 {
1076         int ifidx;
1077
1078         /*
1079          * The kernel supports that when the low-level driver does,
1080          * but we currently don't because we need per-BSS data that
1081          * currently we can't handle easily.
1082          */
1083         return -1;
1084
1085         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1086         if (ifidx < 0)
1087                 return -1;
1088         if (hostapd_set_iface_flags(priv, ifname, 1)) {
1089                 nl80211_remove_iface(priv, ifidx);
1090                 return -1;
1091         }
1092         return 0;
1093 }
1094
1095
1096 static int i802_bss_remove(void *priv, const char *ifname)
1097 {
1098         nl80211_remove_iface(priv, if_nametoindex(ifname));
1099         return 0;
1100 }
1101
1102
1103 static int i802_set_beacon(const char *iface, void *priv,
1104                            u8 *head, size_t head_len,
1105                            u8 *tail, size_t tail_len)
1106 {
1107         struct i802_driver_data *drv = priv;
1108         struct nl_msg *msg;
1109         u8 cmd = NL80211_CMD_NEW_BEACON;
1110         int ret;
1111
1112         msg = nlmsg_alloc();
1113         if (!msg)
1114                 return -ENOMEM;
1115
1116         if (drv->beacon_set)
1117                 cmd = NL80211_CMD_SET_BEACON;
1118
1119         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1120                     0, cmd, 0);
1121         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1122         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1123         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1124         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1125
1126         if (!drv->dtim_period)
1127                 drv->dtim_period = 2;
1128         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1129
1130         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1131         if (!ret)
1132                 drv->beacon_set = 1;
1133         return ret;
1134  nla_put_failure:
1135         return -ENOBUFS;
1136 }
1137
1138
1139 static int i802_del_beacon(struct i802_driver_data *drv)
1140 {
1141         struct nl_msg *msg;
1142
1143         msg = nlmsg_alloc();
1144         if (!msg)
1145                 return -ENOMEM;
1146
1147         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1148                     0, NL80211_CMD_DEL_BEACON, 0);
1149         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1150
1151         return send_and_recv_msgs(drv, msg, NULL, NULL);
1152  nla_put_failure:
1153         return -ENOBUFS;
1154 }
1155
1156
1157 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1158 {
1159         struct i802_driver_data *drv = priv;
1160
1161         /*
1162          * FIXME: This needs to be per interface (BSS)
1163          */
1164         drv->ieee802_1x_active = enabled;
1165         return 0;
1166 }
1167
1168
1169 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1170 {
1171         struct i802_driver_data *drv = priv;
1172         struct iwreq iwr;
1173
1174         memset(&iwr, 0, sizeof(iwr));
1175
1176         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1177         iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1178         iwr.u.param.value = enabled;
1179
1180         ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1181
1182         /* ignore errors, the kernel/driver might not care */
1183         return 0;
1184 }
1185
1186
1187 static int i802_set_internal_bridge(void *priv, int value)
1188 {
1189         return -1;
1190 }
1191
1192
1193 static int i802_set_beacon_int(void *priv, int value)
1194 {
1195         struct i802_driver_data *drv = priv;
1196         struct nl_msg *msg;
1197
1198         drv->beacon_int = value;
1199
1200         if (!drv->beacon_set)
1201                 return 0;
1202
1203         msg = nlmsg_alloc();
1204         if (!msg)
1205                 return -ENOMEM;
1206
1207         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1208                     0, NL80211_CMD_SET_BEACON, 0);
1209         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1210
1211         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1212
1213         return send_and_recv_msgs(drv, msg, NULL, NULL);
1214  nla_put_failure:
1215         return -ENOBUFS;
1216 }
1217
1218
1219 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1220 {
1221         struct i802_driver_data *drv = priv;
1222         struct nl_msg *msg;
1223
1224         msg = nlmsg_alloc();
1225         if (!msg)
1226                 return -ENOMEM;
1227
1228         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1229                     0, NL80211_CMD_SET_BEACON, 0);
1230         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1231
1232         drv->dtim_period = value;
1233         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1234
1235         return send_and_recv_msgs(drv, msg, NULL, NULL);
1236  nla_put_failure:
1237         return -ENOBUFS;
1238 }
1239
1240
1241 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
1242 {
1243 #ifdef NL80211_CMD_SET_BSS
1244         struct i802_driver_data *drv = priv;
1245         struct nl_msg *msg;
1246
1247         msg = nlmsg_alloc();
1248         if (!msg)
1249                 return -ENOMEM;
1250
1251         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1252                     NL80211_CMD_SET_BSS, 0);
1253
1254         if (cts >= 0)
1255                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
1256         if (preamble >= 0)
1257                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
1258         if (slot >= 0)
1259                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
1260
1261         /* TODO: multi-BSS support */
1262         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1263
1264         return send_and_recv_msgs(drv, msg, NULL, NULL);
1265  nla_put_failure:
1266         return -ENOBUFS;
1267 #else /* NL80211_CMD_SET_BSS */
1268         return -1;
1269 #endif /* NL80211_CMD_SET_BSS */
1270 }
1271
1272
1273 static int i802_set_cts_protect(void *priv, int value)
1274 {
1275         return i802_set_bss(priv, value, -1, -1);
1276 }
1277
1278
1279 static int i802_set_preamble(void *priv, int value)
1280 {
1281         return i802_set_bss(priv, -1, value, -1);
1282 }
1283
1284
1285 static int i802_set_short_slot_time(void *priv, int value)
1286 {
1287         return i802_set_bss(priv, -1, -1, value);
1288 }
1289
1290
1291 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1292 {
1293         switch (type) {
1294         case HOSTAPD_IF_VLAN:
1295                 return NL80211_IFTYPE_AP_VLAN;
1296         case HOSTAPD_IF_WDS:
1297                 return NL80211_IFTYPE_WDS;
1298         }
1299         return -1;
1300 }
1301
1302
1303 static int i802_if_add(const char *iface, void *priv,
1304                        enum hostapd_driver_if_type type, char *ifname,
1305                        const u8 *addr)
1306 {
1307         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1308                 return -1;
1309         return 0;
1310 }
1311
1312
1313 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1314                           char *ifname, const u8 *addr)
1315 {
1316         /* unused at the moment */
1317         return -1;
1318 }
1319
1320
1321 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1322                           const char *ifname, const u8 *addr)
1323 {
1324         nl80211_remove_iface(priv, if_nametoindex(ifname));
1325         return 0;
1326 }
1327
1328
1329 struct phy_info_arg {
1330         u16 *num_modes;
1331         struct hostapd_hw_modes *modes;
1332 };
1333
1334 static int phy_info_handler(struct nl_msg *msg, void *arg)
1335 {
1336         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1337         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1338         struct phy_info_arg *phy_info = arg;
1339
1340         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1341
1342         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1343         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1344                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1345                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1346                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1347                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1348                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1349         };
1350
1351         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1352         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1353                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1354                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1355         };
1356
1357         struct nlattr *nl_band;
1358         struct nlattr *nl_freq;
1359         struct nlattr *nl_rate;
1360         int rem_band, rem_freq, rem_rate;
1361         struct hostapd_hw_modes *mode;
1362         int idx, mode_is_set;
1363
1364         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1365                   genlmsg_attrlen(gnlh, 0), NULL);
1366
1367         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1368                 return NL_SKIP;
1369
1370         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1371                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1372                 if (!mode)
1373                         return NL_SKIP;
1374                 phy_info->modes = mode;
1375
1376                 mode_is_set = 0;
1377
1378                 mode = &phy_info->modes[*(phy_info->num_modes)];
1379                 memset(mode, 0, sizeof(*mode));
1380                 *(phy_info->num_modes) += 1;
1381
1382                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1383                           nla_len(nl_band), NULL);
1384
1385                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1386                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1387                                   nla_len(nl_freq), freq_policy);
1388                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1389                                 continue;
1390                         mode->num_channels++;
1391                 }
1392
1393                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1394                 if (!mode->channels)
1395                         return NL_SKIP;
1396
1397                 idx = 0;
1398
1399                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1400                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1401                                   nla_len(nl_freq), freq_policy);
1402                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1403                                 continue;
1404
1405                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1406                         mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
1407                                                     HOSTAPD_CHAN_W_ACTIVE_SCAN |
1408                                                     HOSTAPD_CHAN_W_IBSS;
1409
1410                         if (!mode_is_set) {
1411                                 /* crude heuristic */
1412                                 if (mode->channels[idx].freq < 4000)
1413                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1414                                 else
1415                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1416                                 mode_is_set = 1;
1417                         }
1418
1419                         /* crude heuristic */
1420                         if (mode->channels[idx].freq < 4000)
1421                                 if (mode->channels[idx].freq == 2848)
1422                                         mode->channels[idx].chan = 14;
1423                                 else
1424                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1425                         else
1426                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1427
1428                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1429                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
1430                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1431                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
1432                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1433                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
1434                         idx++;
1435                 }
1436
1437                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1438                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1439                                   nla_len(nl_rate), rate_policy);
1440                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1441                                 continue;
1442                         mode->num_rates++;
1443                 }
1444
1445                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1446                 if (!mode->rates)
1447                         return NL_SKIP;
1448
1449                 idx = 0;
1450
1451                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1452                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1453                                   nla_len(nl_rate), rate_policy);
1454                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1455                                 continue;
1456                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1457
1458                         /* crude heuristic */
1459                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1460                             mode->rates[idx].rate > 200)
1461                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1462
1463                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1464                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1465
1466                         idx++;
1467                 }
1468         }
1469
1470         return NL_SKIP;
1471 }
1472
1473 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1474                                                          u16 *num_modes,
1475                                                          u16 *flags)
1476 {
1477         struct i802_driver_data *drv = priv;
1478         struct nl_msg *msg;
1479         struct phy_info_arg result = {
1480                 .num_modes = num_modes,
1481                 .modes = NULL,
1482         };
1483
1484         *num_modes = 0;
1485         *flags = 0;
1486
1487         msg = nlmsg_alloc();
1488         if (!msg)
1489                 return NULL;
1490
1491         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1492                     0, NL80211_CMD_GET_WIPHY, 0);
1493
1494         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1495
1496         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1497                 return result.modes;
1498  nla_put_failure:
1499         return NULL;
1500 }
1501
1502
1503 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1504                              const char *ifname, int vlan_id)
1505 {
1506         struct i802_driver_data *drv = priv;
1507         struct nl_msg *msg;
1508
1509         msg = nlmsg_alloc();
1510         if (!msg)
1511                 return -ENOMEM;
1512
1513         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1514                     0, NL80211_CMD_SET_STATION, 0);
1515
1516         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1517                     if_nametoindex(drv->iface));
1518         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1519         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1520                     if_nametoindex(ifname));
1521
1522         return send_and_recv_msgs(drv, msg, NULL, NULL);
1523  nla_put_failure:
1524         return -ENOBUFS;
1525 }
1526
1527
1528 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1529 {
1530         struct sta_info *sta;
1531
1532         sta = ap_get_sta(hapd, ta);
1533         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1534                 printf("Data/PS-poll frame from not associated STA "
1535                        MACSTR "\n", MAC2STR(ta));
1536                 if (sta && (sta->flags & WLAN_STA_AUTH))
1537                         hostapd_sta_disassoc(
1538                                 hapd, ta,
1539                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1540                 else
1541                         hostapd_sta_deauth(
1542                                 hapd, ta,
1543                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1544         }
1545 }
1546
1547
1548 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1549                                int ok)
1550 {
1551         struct ieee80211_hdr *hdr;
1552         u16 fc, type, stype;
1553         struct sta_info *sta;
1554
1555         hdr = (struct ieee80211_hdr *) buf;
1556         fc = le_to_host16(hdr->frame_control);
1557
1558         type = WLAN_FC_GET_TYPE(fc);
1559         stype = WLAN_FC_GET_STYPE(fc);
1560
1561         switch (type) {
1562         case WLAN_FC_TYPE_MGMT:
1563                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1564                            ok ? "ACK" : "fail");
1565                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1566                 break;
1567         case WLAN_FC_TYPE_CTRL:
1568                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1569                            ok ? "ACK" : "fail");
1570                 break;
1571         case WLAN_FC_TYPE_DATA:
1572                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1573                            ok ? "ACK" : "fail");
1574                 sta = ap_get_sta(hapd, hdr->addr1);
1575                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1576                         wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1577                                    "activity poll", MAC2STR(sta->addr),
1578                                    ok ? "ACKed" : "did not ACK");
1579                         if (ok)
1580                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
1581                 }
1582                 if (sta)
1583                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1584                 break;
1585         default:
1586                 printf("unknown TX callback frame type %d\n", type);
1587                 break;
1588         }
1589 }
1590
1591
1592 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1593                          struct hostapd_frame_info *hfi,
1594                          enum ieee80211_msg_type msg_type)
1595 {
1596         struct ieee80211_hdr *hdr;
1597         u16 fc, type, stype;
1598         size_t data_len = len;
1599         struct hostapd_data *hapd = NULL;
1600         int broadcast_bssid = 0;
1601         size_t i;
1602         u8 *bssid;
1603
1604         /*
1605          * PS-Poll frames are 16 bytes. All other frames are
1606          * 24 bytes or longer.
1607          */
1608         if (len < 16)
1609                 return;
1610
1611         hdr = (struct ieee80211_hdr *) buf;
1612         fc = le_to_host16(hdr->frame_control);
1613
1614         type = WLAN_FC_GET_TYPE(fc);
1615         stype = WLAN_FC_GET_STYPE(fc);
1616
1617         switch (type) {
1618         case WLAN_FC_TYPE_DATA:
1619                 if (len < 24)
1620                         return;
1621                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1622                 case WLAN_FC_TODS:
1623                         bssid = hdr->addr1;
1624                         break;
1625                 default:
1626                         /* discard */
1627                         return;
1628                 }
1629                 break;
1630         case WLAN_FC_TYPE_CTRL:
1631                 /* discard non-ps-poll frames */
1632                 if (stype != WLAN_FC_STYPE_PSPOLL)
1633                         return;
1634                 bssid = hdr->addr1;
1635                 break;
1636         case WLAN_FC_TYPE_MGMT:
1637                 bssid = hdr->addr3;
1638                 break;
1639         default:
1640                 /* discard */
1641                 return;
1642         }
1643
1644         /* find interface frame belongs to */
1645         for (i = 0; i < iface->num_bss; i++) {
1646                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1647                         hapd = iface->bss[i];
1648                         break;
1649                 }
1650         }
1651
1652         if (hapd == NULL) {
1653                 hapd = iface->bss[0];
1654
1655                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1656                     bssid[2] != 0xff || bssid[3] != 0xff ||
1657                     bssid[4] != 0xff || bssid[5] != 0xff) {
1658                         /*
1659                          * Unknown BSSID - drop frame if this is not from
1660                          * passive scanning or a beacon (at least ProbeReq
1661                          * frames to other APs may be allowed through RX
1662                          * filtering in the wlan hw/driver)
1663                          */
1664                         if ((type != WLAN_FC_TYPE_MGMT ||
1665                              stype != WLAN_FC_STYPE_BEACON))
1666                                 return;
1667                 } else
1668                         broadcast_bssid = 1;
1669         }
1670
1671         switch (msg_type) {
1672         case ieee80211_msg_normal:
1673                 /* continue processing */
1674                 break;
1675         case ieee80211_msg_tx_callback_ack:
1676                 handle_tx_callback(hapd, buf, data_len, 1);
1677                 return;
1678         case ieee80211_msg_tx_callback_fail:
1679                 handle_tx_callback(hapd, buf, data_len, 0);
1680                 return;
1681         }
1682
1683         switch (type) {
1684         case WLAN_FC_TYPE_MGMT:
1685                 if (stype != WLAN_FC_STYPE_BEACON &&
1686                     stype != WLAN_FC_STYPE_PROBE_REQ)
1687                         wpa_printf(MSG_MSGDUMP, "MGMT");
1688                 if (broadcast_bssid) {
1689                         for (i = 0; i < iface->num_bss; i++)
1690                                 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1691                                                 stype, hfi);
1692                 } else
1693                         ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1694                 break;
1695         case WLAN_FC_TYPE_CTRL:
1696                 /* can only get here with PS-Poll frames */
1697                 wpa_printf(MSG_DEBUG, "CTRL");
1698                 handle_unknown_sta(hapd, hdr->addr2);
1699                 break;
1700         case WLAN_FC_TYPE_DATA:
1701                 wpa_printf(MSG_DEBUG, "DATA");
1702                 handle_unknown_sta(hapd, hdr->addr2);
1703                 break;
1704         }
1705 }
1706
1707
1708 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1709 {
1710         struct i802_driver_data *drv = eloop_ctx;
1711         struct hostapd_data *hapd = drv->hapd;
1712         struct sockaddr_ll lladdr;
1713         unsigned char buf[3000];
1714         int len;
1715         socklen_t fromlen = sizeof(lladdr);
1716
1717         len = recvfrom(sock, buf, sizeof(buf), 0,
1718                        (struct sockaddr *)&lladdr, &fromlen);
1719         if (len < 0) {
1720                 perror("recv");
1721                 return;
1722         }
1723
1724         if (have_ifidx(drv, lladdr.sll_ifindex))
1725                 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1726 }
1727
1728
1729 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1730 {
1731         struct i802_driver_data *drv = eloop_ctx;
1732         int len;
1733         unsigned char buf[3000];
1734         struct hostapd_data *hapd = drv->hapd;
1735         struct ieee80211_radiotap_iterator iter;
1736         int ret;
1737         struct hostapd_frame_info hfi;
1738         int injected = 0, failed = 0, msg_type, rxflags = 0;
1739
1740         len = recv(sock, buf, sizeof(buf), 0);
1741         if (len < 0) {
1742                 perror("recv");
1743                 return;
1744         }
1745
1746         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1747                 printf("received invalid radiotap frame\n");
1748                 return;
1749         }
1750
1751         memset(&hfi, 0, sizeof(hfi));
1752
1753         while (1) {
1754                 ret = ieee80211_radiotap_iterator_next(&iter);
1755                 if (ret == -ENOENT)
1756                         break;
1757                 if (ret) {
1758                         printf("received invalid radiotap frame (%d)\n", ret);
1759                         return;
1760                 }
1761                 switch (iter.this_arg_index) {
1762                 case IEEE80211_RADIOTAP_FLAGS:
1763                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1764                                 len -= 4;
1765                         break;
1766                 case IEEE80211_RADIOTAP_RX_FLAGS:
1767                         rxflags = 1;
1768                         break;
1769                 case IEEE80211_RADIOTAP_TX_FLAGS:
1770                         injected = 1;
1771                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1772                                         IEEE80211_RADIOTAP_F_TX_FAIL;
1773                         break;
1774                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1775                         break;
1776                 case IEEE80211_RADIOTAP_CHANNEL:
1777                         /* TODO convert from freq/flags to channel number
1778                         hfi.channel = XXX;
1779                         hfi.phytype = XXX;
1780                          */
1781                         break;
1782                 case IEEE80211_RADIOTAP_RATE:
1783                         hfi.datarate = *iter.this_arg * 5;
1784                         break;
1785                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1786                         hfi.ssi_signal = *iter.this_arg;
1787                         break;
1788                 }
1789         }
1790
1791         if (rxflags && injected)
1792                 return;
1793
1794         if (!injected)
1795                 msg_type = ieee80211_msg_normal;
1796         else if (failed)
1797                 msg_type = ieee80211_msg_tx_callback_fail;
1798         else
1799                 msg_type = ieee80211_msg_tx_callback_ack;
1800
1801         handle_frame(hapd->iface, buf + iter.max_length,
1802                      len - iter.max_length, &hfi, msg_type);
1803 }
1804
1805
1806 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1807 {
1808         char buf[IFNAMSIZ];
1809         struct sockaddr_ll ll;
1810         int optval;
1811         socklen_t optlen;
1812
1813         snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1814         buf[IFNAMSIZ - 1] = '\0';
1815
1816         drv->monitor_ifidx =
1817                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1818
1819         if (drv->monitor_ifidx < 0)
1820                 return -1;
1821
1822         if (hostapd_set_iface_flags(drv, buf, 1))
1823                 goto error;
1824
1825         memset(&ll, 0, sizeof(ll));
1826         ll.sll_family = AF_PACKET;
1827         ll.sll_ifindex = drv->monitor_ifidx;
1828         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1829         if (drv->monitor_sock < 0) {
1830                 perror("socket[PF_PACKET,SOCK_RAW]");
1831                 goto error;
1832         }
1833
1834         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1835                  sizeof(ll)) < 0) {
1836                 perror("monitor socket bind");
1837                 goto error;
1838         }
1839
1840         optlen = sizeof(optval);
1841         optval = 20;
1842         if (setsockopt
1843             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1844                 perror("Failed to set socket priority");
1845                 goto error;
1846         }
1847
1848         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1849                                      drv, NULL)) {
1850                 printf("Could not register monitor read socket\n");
1851                 goto error;
1852         }
1853
1854         return 0;
1855  error:
1856         nl80211_remove_iface(drv, drv->monitor_ifidx);
1857         return -1;
1858 }
1859
1860
1861 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1862                                    const char *ifname)
1863 {
1864         struct nl_msg *msg;
1865         int ret = -ENOBUFS;
1866
1867         msg = nlmsg_alloc();
1868         if (!msg)
1869                 return -ENOMEM;
1870
1871         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1872                     0, NL80211_CMD_SET_INTERFACE, 0);
1873         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1874                     if_nametoindex(ifname));
1875         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1876
1877         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1878         if (!ret)
1879                 return 0;
1880  nla_put_failure:
1881         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1882                    "mode.", ifname);
1883         return ret;
1884 }
1885
1886
1887 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1888 {
1889         struct ifreq ifr;
1890         struct sockaddr_ll addr;
1891
1892         drv->ioctl_sock = -1;
1893
1894         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1895         if (drv->ioctl_sock < 0) {
1896                 perror("socket[PF_INET,SOCK_DGRAM]");
1897                 return -1;
1898         }
1899
1900         /* start listening for EAPOL on the default AP interface */
1901         add_ifidx(drv, if_nametoindex(drv->iface));
1902
1903         if (hostapd_set_iface_flags(drv, drv->iface, 0))
1904                 return -1;
1905
1906         if (bssid) {
1907                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1908                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1909                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1910
1911                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1912                         perror("ioctl(SIOCSIFHWADDR)");
1913                         return -1;
1914                 }
1915         }
1916
1917         /*
1918          * initialise generic netlink and nl80211
1919          */
1920         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1921         if (!drv->nl_cb) {
1922                 printf("Failed to allocate netlink callbacks.\n");
1923                 return -1;
1924         }
1925
1926         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1927         if (!drv->nl_handle) {
1928                 printf("Failed to allocate netlink handle.\n");
1929                 return -1;
1930         }
1931
1932         if (genl_connect(drv->nl_handle)) {
1933                 printf("Failed to connect to generic netlink.\n");
1934                 return -1;
1935         }
1936
1937         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1938         if (!drv->nl_cache) {
1939                 printf("Failed to allocate generic netlink cache.\n");
1940                 return -1;
1941         }
1942
1943         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1944         if (!drv->nl80211) {
1945                 printf("nl80211 not found.\n");
1946                 return -1;
1947         }
1948
1949         /* Initialise a monitor interface */
1950         if (nl80211_create_monitor_interface(drv))
1951                 return -1;
1952
1953         if (nl80211_set_master_mode(drv, drv->iface))
1954                 return -1;
1955
1956         if (hostapd_set_iface_flags(drv, drv->iface, 1))
1957                 return -1;
1958
1959         memset(&addr, 0, sizeof(addr));
1960         addr.sll_family = AF_PACKET;
1961         addr.sll_ifindex = ifr.ifr_ifindex;
1962         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
1963                    addr.sll_ifindex);
1964
1965         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
1966         if (drv->eapol_sock < 0) {
1967                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
1968                 return -1;
1969         }
1970
1971         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
1972         {
1973                 printf("Could not register read socket for eapol\n");
1974                 return -1;
1975         }
1976
1977         memset(&ifr, 0, sizeof(ifr));
1978         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
1979         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
1980                 perror("ioctl(SIOCGIFHWADDR)");
1981                 return -1;
1982         }
1983
1984         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
1985                 printf("Invalid HW-addr family 0x%04x\n",
1986                        ifr.ifr_hwaddr.sa_family);
1987                 return -1;
1988         }
1989         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
1990
1991         return 0;
1992 }
1993
1994
1995 static int i802_get_inact_sec(void *priv, const u8 *addr)
1996 {
1997         struct hostap_sta_driver_data data;
1998         int ret;
1999
2000         data.inactive_msec = (unsigned long) -1;
2001         ret = i802_read_sta_data(priv, &data, addr);
2002         if (ret || data.inactive_msec == (unsigned long) -1)
2003                 return -1;
2004         return data.inactive_msec / 1000;
2005 }
2006
2007
2008 static int i802_sta_clear_stats(void *priv, const u8 *addr)
2009 {
2010 #if 0
2011         /* TODO */
2012 #endif
2013         return 0;
2014 }
2015
2016
2017 static void
2018 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
2019                                        char *custom)
2020 {
2021         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
2022
2023         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
2024                 char *pos;
2025                 u8 addr[ETH_ALEN];
2026                 pos = strstr(custom, "addr=");
2027                 if (pos == NULL) {
2028                         wpa_printf(MSG_DEBUG,
2029                                    "MLME-MICHAELMICFAILURE.indication "
2030                                    "without sender address ignored");
2031                         return;
2032                 }
2033                 pos += 5;
2034                 if (hwaddr_aton(pos, addr) == 0) {
2035                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
2036                 } else {
2037                         wpa_printf(MSG_DEBUG,
2038                                    "MLME-MICHAELMICFAILURE.indication "
2039                                    "with invalid MAC address");
2040                 }
2041         }
2042 }
2043
2044
2045 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2046                                             char *data, int len)
2047 {
2048         struct iw_event iwe_buf, *iwe = &iwe_buf;
2049         char *pos, *end, *custom, *buf;
2050
2051         pos = data;
2052         end = data + len;
2053
2054         while (pos + IW_EV_LCP_LEN <= end) {
2055                 /* Event data may be unaligned, so make a local, aligned copy
2056                  * before processing. */
2057                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2058                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2059                            iwe->cmd, iwe->len);
2060                 if (iwe->len <= IW_EV_LCP_LEN)
2061                         return;
2062
2063                 custom = pos + IW_EV_POINT_LEN;
2064                 if (drv->we_version > 18 &&
2065                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
2066                      iwe->cmd == IWEVCUSTOM)) {
2067                         /* WE-19 removed the pointer from struct iw_point */
2068                         char *dpos = (char *) &iwe_buf.u.data.length;
2069                         int dlen = dpos - (char *) &iwe_buf;
2070                         memcpy(dpos, pos + IW_EV_LCP_LEN,
2071                                sizeof(struct iw_event) - dlen);
2072                 } else {
2073                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2074                         custom += IW_EV_POINT_OFF;
2075                 }
2076
2077                 switch (iwe->cmd) {
2078                 case IWEVCUSTOM:
2079                         if (custom + iwe->u.data.length > end)
2080                                 return;
2081                         buf = malloc(iwe->u.data.length + 1);
2082                         if (buf == NULL)
2083                                 return;
2084                         memcpy(buf, custom, iwe->u.data.length);
2085                         buf[iwe->u.data.length] = '\0';
2086                         hostapd_wireless_event_wireless_custom(drv, buf);
2087                         free(buf);
2088                         break;
2089                 }
2090
2091                 pos += iwe->len;
2092         }
2093 }
2094
2095
2096 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2097                                                struct nlmsghdr *h, int len)
2098 {
2099         struct ifinfomsg *ifi;
2100         int attrlen, nlmsg_len, rta_len;
2101         struct rtattr *attr;
2102
2103         if (len < (int) sizeof(*ifi))
2104                 return;
2105
2106         ifi = NLMSG_DATA(h);
2107
2108         /* TODO: use ifi->ifi_index to filter out wireless events from other
2109          * interfaces */
2110
2111         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2112
2113         attrlen = h->nlmsg_len - nlmsg_len;
2114         if (attrlen < 0)
2115                 return;
2116
2117         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2118
2119         rta_len = RTA_ALIGN(sizeof(struct rtattr));
2120         while (RTA_OK(attr, attrlen)) {
2121                 if (attr->rta_type == IFLA_WIRELESS) {
2122                         hostapd_wireless_event_wireless(
2123                                 drv, ((char *) attr) + rta_len,
2124                                 attr->rta_len - rta_len);
2125                 }
2126                 attr = RTA_NEXT(attr, attrlen);
2127         }
2128 }
2129
2130
2131 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2132                                            void *sock_ctx)
2133 {
2134         char buf[256];
2135         int left;
2136         struct sockaddr_nl from;
2137         socklen_t fromlen;
2138         struct nlmsghdr *h;
2139         struct i802_driver_data *drv = eloop_ctx;
2140
2141         fromlen = sizeof(from);
2142         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2143                         (struct sockaddr *) &from, &fromlen);
2144         if (left < 0) {
2145                 if (errno != EINTR && errno != EAGAIN)
2146                         perror("recvfrom(netlink)");
2147                 return;
2148         }
2149
2150         h = (struct nlmsghdr *) buf;
2151         while (left >= (int) sizeof(*h)) {
2152                 int len, plen;
2153
2154                 len = h->nlmsg_len;
2155                 plen = len - sizeof(*h);
2156                 if (len > left || plen < 0) {
2157                         printf("Malformed netlink message: "
2158                                "len=%d left=%d plen=%d\n",
2159                                len, left, plen);
2160                         break;
2161                 }
2162
2163                 switch (h->nlmsg_type) {
2164                 case RTM_NEWLINK:
2165                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
2166                         break;
2167                 }
2168
2169                 len = NLMSG_ALIGN(len);
2170                 left -= len;
2171                 h = (struct nlmsghdr *) ((char *) h + len);
2172         }
2173
2174         if (left > 0) {
2175                 printf("%d extra bytes in the end of netlink message\n", left);
2176         }
2177 }
2178
2179
2180 static int hostap_get_we_version(struct i802_driver_data *drv)
2181 {
2182         struct iw_range *range;
2183         struct iwreq iwr;
2184         int minlen;
2185         size_t buflen;
2186
2187         drv->we_version = 0;
2188
2189         /*
2190          * Use larger buffer than struct iw_range in order to allow the
2191          * structure to grow in the future.
2192          */
2193         buflen = sizeof(struct iw_range) + 500;
2194         range = os_zalloc(buflen);
2195         if (range == NULL)
2196                 return -1;
2197
2198         memset(&iwr, 0, sizeof(iwr));
2199         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2200         iwr.u.data.pointer = (caddr_t) range;
2201         iwr.u.data.length = buflen;
2202
2203         minlen = ((char *) &range->enc_capa) - (char *) range +
2204                 sizeof(range->enc_capa);
2205
2206         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2207                 perror("ioctl[SIOCGIWRANGE]");
2208                 free(range);
2209                 return -1;
2210         } else if (iwr.u.data.length >= minlen &&
2211                    range->we_version_compiled >= 18) {
2212                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2213                            "WE(source)=%d enc_capa=0x%x",
2214                            range->we_version_compiled,
2215                            range->we_version_source,
2216                            range->enc_capa);
2217                 drv->we_version = range->we_version_compiled;
2218         }
2219
2220         free(range);
2221         return 0;
2222 }
2223
2224
2225 static int i802_wireless_event_init(void *priv)
2226 {
2227         struct i802_driver_data *drv = priv;
2228         int s;
2229         struct sockaddr_nl local;
2230
2231         hostap_get_we_version(drv);
2232
2233         drv->wext_sock = -1;
2234
2235         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2236         if (s < 0) {
2237                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2238                 return -1;
2239         }
2240
2241         memset(&local, 0, sizeof(local));
2242         local.nl_family = AF_NETLINK;
2243         local.nl_groups = RTMGRP_LINK;
2244         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2245                 perror("bind(netlink)");
2246                 close(s);
2247                 return -1;
2248         }
2249
2250         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2251                                  NULL);
2252         drv->wext_sock = s;
2253
2254         return 0;
2255 }
2256
2257
2258 static void i802_wireless_event_deinit(void *priv)
2259 {
2260         struct i802_driver_data *drv = priv;
2261         if (drv->wext_sock < 0)
2262                 return;
2263         eloop_unregister_read_sock(drv->wext_sock);
2264         close(drv->wext_sock);
2265 }
2266
2267
2268 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2269 {
2270         struct i802_driver_data *drv = priv;
2271         struct ieee80211_mgmt mgmt;
2272
2273         memset(&mgmt, 0, sizeof(mgmt));
2274         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2275                                           WLAN_FC_STYPE_DEAUTH);
2276         memcpy(mgmt.da, addr, ETH_ALEN);
2277         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2278         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2279         mgmt.u.deauth.reason_code = host_to_le16(reason);
2280         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2281                                       sizeof(mgmt.u.deauth), 0);
2282 }
2283
2284
2285 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2286 {
2287         struct i802_driver_data *drv = priv;
2288         struct ieee80211_mgmt mgmt;
2289
2290         memset(&mgmt, 0, sizeof(mgmt));
2291         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2292                                           WLAN_FC_STYPE_DISASSOC);
2293         memcpy(mgmt.da, addr, ETH_ALEN);
2294         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2295         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2296         mgmt.u.disassoc.reason_code = host_to_le16(reason);
2297         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2298                                        sizeof(mgmt.u.disassoc), 0);
2299 }
2300
2301
2302 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2303 {
2304         struct i802_driver_data *drv;
2305
2306         drv = os_zalloc(sizeof(struct i802_driver_data));
2307         if (drv == NULL) {
2308                 printf("Could not allocate memory for i802 driver data\n");
2309                 return NULL;
2310         }
2311
2312         drv->hapd = hapd;
2313         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2314
2315         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2316         drv->if_indices = drv->default_if_indices;
2317         drv->bridge = if_nametoindex(hapd->conf->bridge);
2318
2319         if (i802_init_sockets(drv, bssid))
2320                 goto failed;
2321
2322         return drv;
2323
2324 failed:
2325         free(drv);
2326         return NULL;
2327 }
2328
2329
2330 static void *i802_init(struct hostapd_data *hapd)
2331 {
2332         return i802_init_bssid(hapd, NULL);
2333 }
2334
2335
2336 static void i802_deinit(void *priv)
2337 {
2338         struct i802_driver_data *drv = priv;
2339
2340         i802_del_beacon(drv);
2341
2342         /* remove monitor interface */
2343         nl80211_remove_iface(drv, drv->monitor_ifidx);
2344
2345         (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2346
2347         if (drv->monitor_sock >= 0) {
2348                 eloop_unregister_read_sock(drv->monitor_sock);
2349                 close(drv->monitor_sock);
2350         }
2351         if (drv->ioctl_sock >= 0)
2352                 close(drv->ioctl_sock);
2353         if (drv->eapol_sock >= 0) {
2354                 eloop_unregister_read_sock(drv->eapol_sock);
2355                 close(drv->eapol_sock);
2356         }
2357
2358         genl_family_put(drv->nl80211);
2359         nl_cache_free(drv->nl_cache);
2360         nl_handle_destroy(drv->nl_handle);
2361         nl_cb_put(drv->nl_cb);
2362
2363         if (drv->if_indices != drv->default_if_indices)
2364                 free(drv->if_indices);
2365
2366         free(drv);
2367 }
2368
2369
2370 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2371         .name = "nl80211",
2372         .init = i802_init,
2373         .init_bssid = i802_init_bssid,
2374         .deinit = i802_deinit,
2375         .wireless_event_init = i802_wireless_event_init,
2376         .wireless_event_deinit = i802_wireless_event_deinit,
2377         .set_ieee8021x = i802_set_ieee8021x,
2378         .set_privacy = i802_set_privacy,
2379         .set_encryption = i802_set_encryption,
2380         .get_seqnum = i802_get_seqnum,
2381         .flush = i802_flush,
2382         .read_sta_data = i802_read_sta_data,
2383         .send_eapol = i802_send_eapol,
2384         .sta_set_flags = i802_sta_set_flags,
2385         .sta_deauth = i802_sta_deauth,
2386         .sta_disassoc = i802_sta_disassoc,
2387         .sta_remove = i802_sta_remove,
2388         .set_ssid = i802_set_ssid,
2389         .send_mgmt_frame = i802_send_mgmt_frame,
2390         .sta_add2 = i802_sta_add2,
2391         .get_inact_sec = i802_get_inact_sec,
2392         .sta_clear_stats = i802_sta_clear_stats,
2393         .set_freq = i802_set_freq,
2394         .set_rts = i802_set_rts,
2395         .get_rts = i802_get_rts,
2396         .set_frag = i802_set_frag,
2397         .get_frag = i802_get_frag,
2398         .set_retry = i802_set_retry,
2399         .get_retry = i802_get_retry,
2400         .set_rate_sets = i802_set_rate_sets,
2401         .set_channel_flag = i802_set_channel_flag,
2402         .set_regulatory_domain = i802_set_regulatory_domain,
2403         .set_beacon = i802_set_beacon,
2404         .set_internal_bridge = i802_set_internal_bridge,
2405         .set_beacon_int = i802_set_beacon_int,
2406         .set_dtim_period = i802_set_dtim_period,
2407         .set_cts_protect = i802_set_cts_protect,
2408         .set_preamble = i802_set_preamble,
2409         .set_short_slot_time = i802_set_short_slot_time,
2410         .set_tx_queue_params = i802_set_tx_queue_params,
2411         .bss_add = i802_bss_add,
2412         .bss_remove = i802_bss_remove,
2413         .if_add = i802_if_add,
2414         .if_update = i802_if_update,
2415         .if_remove = i802_if_remove,
2416         .get_hw_feature_data = i802_get_hw_feature_data,
2417         .set_sta_vlan = i802_set_sta_vlan,
2418 };