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