contrib/package/iwinfo/src/iwinfo_nl80211.c

   1 /*
   2  * iwinfo - Wireless Information Library - NL80211 Backend
   3  *
   4  *   Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
   5  *
   6  * The iwinfo library is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation.
   9  *
  10  * The iwinfo library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with the iwinfo library. If not, see http://www.gnu.org/licenses/.
  17  *
  18  * The signal handling code is derived from the official madwifi tools,
  19  * wlanconfig.c in particular. The encryption property handling was
  20  * inspired by the hostapd madwifi driver.
  21  *
  22  * Parts of this code are derived from the Linux iw utility.
  23  */
  24
  25 #include "iwinfo_nl80211.h"
  26 #include "iwinfo_wext.h"
  27
  28 #define min(x, y) ((x) < (y)) ? (x) : (y)
  29
  30 extern struct iwinfo_iso3166_label ISO3166_Names[];
  31 static struct nl80211_state *nls = NULL;
  32
  33 static int nl80211_init(void)
  34 {
  35         int err, fd;
  36
  37         if( !nls )
  38         {
  39                 nls = malloc(sizeof(struct nl80211_state));
  40                 if( !nls ) {
  41                         err = -ENOMEM;
  42                         goto err;
  43                 }
  44
  45                 nls->nl_sock = nl_socket_alloc();
  46                 if( !nls->nl_sock ) {
  47                         err = -ENOMEM;
  48                         goto err;
  49                 }
  50
  51                 if( genl_connect(nls->nl_sock)) {
  52                         err = -ENOLINK;
  53                         goto err;
  54                 }
  55
  56                 fd = nl_socket_get_fd(nls->nl_sock);
  57                 if( fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0 )
  58                 {
  59                         err = -EINVAL;
  60                         goto err;
  61                 }
  62
  63                 if( genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
  64                         err = -ENOMEM;
  65                         goto err;
  66                 }
  67
  68                 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
  69                 if( !nls->nl80211 )
  70                 {
  71                         err = -ENOENT;
  72                         goto err;
  73                 }
  74         }
  75
  76         return 0;
  77
  78
  79 err:
  80         nl80211_close();
  81         return err;
  82 }
  83
  84 static int nl80211_msg_error(struct sockaddr_nl *nla,
  85         struct nlmsgerr *err, void *arg)
  86 {
  87         int *ret = arg;
  88         *ret = err->error;
  89         return NL_STOP;
  90 }
  91
  92 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
  93 {
  94         int *ret = arg;
  95         *ret = 0;
  96         return NL_SKIP;
  97 }
  98
  99 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
 100 {
 101         int *ret = arg;
 102         *ret = 0;
 103         return NL_STOP;
 104 }
 105
 106 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
 107 {
 108         struct nl80211_msg_conveyor *cv = arg;
 109
 110         nlmsg_get(msg);
 111
 112         cv->msg = msg;
 113         cv->hdr = nlmsg_data(nlmsg_hdr(cv->msg));
 114
 115         nla_parse(cv->attr, NL80211_ATTR_MAX,
 116                 genlmsg_attrdata(cv->hdr, 0),
 117                 genlmsg_attrlen(cv->hdr, 0), NULL);
 118
 119         return NL_SKIP;
 120 }
 121
 122 static void nl80211_free(struct nl80211_msg_conveyor *cv)
 123 {
 124         if( cv )
 125         {
 126                 if( cv->cb )
 127                         nl_cb_put(cv->cb);
 128
 129                 if( cv->msg )
 130                         nlmsg_free(cv->msg);
 131
 132                 cv->cb  = NULL;
 133                 cv->msg = NULL;
 134         }
 135 }
 136
 137 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
 138 {
 139         static struct nl80211_msg_conveyor cv;
 140
 141         int ifidx = -1, phyidx = -1;
 142         struct nl_msg *req = NULL;
 143         struct nl_cb *cb = NULL;
 144
 145         if( nl80211_init() < 0 )
 146                 goto err;
 147
 148         if( !strncmp(ifname, "phy", 3) )
 149                 phyidx = atoi(&ifname[3]);
 150         else if( !strncmp(ifname, "radio", 5) )
 151                 phyidx = atoi(&ifname[5]);
 152         else if( !strncmp(ifname, "mon.", 4) )
 153                 ifidx = if_nametoindex(&ifname[4]);
 154         else
 155                 ifidx = if_nametoindex(ifname);
 156
 157         if( (ifidx < 0) && (phyidx < 0) )
 158                 return NULL;
 159
 160         req = nlmsg_alloc();
 161         if( !req )
 162                 goto err;
 163
 164         cb = nl_cb_alloc(NL_CB_DEFAULT);
 165         if( !cb )
 166                 goto err;
 167
 168         genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
 169                 flags, cmd, 0);
 170
 171         if( ifidx > -1 )
 172                 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
 173
 174         if( phyidx > -1 )
 175                 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
 176
 177         nlmsg_get(req);
 178
 179         cv.msg       = req;
 180         cv.cb        = cb;
 181         cv.custom_cb = 0;
 182
 183         return &cv;
 184
 185 err:
 186 nla_put_failure:
 187         if( cb )
 188                 nl_cb_put(cb);
 189
 190         if( req )
 191                 nlmsg_free(req);
 192
 193         return NULL;
 194 }
 195
 196 static void nl80211_cb(struct nl80211_msg_conveyor *cv,
 197         int (*cb)(struct nl_msg *, void *), void *arg)
 198 {
 199         cv->custom_cb = 1;
 200         nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, arg);
 201 }
 202
 203 static struct nl80211_msg_conveyor * nl80211_send(struct nl80211_msg_conveyor *cv)
 204 {
 205         static struct nl80211_msg_conveyor rcv;
 206         int err = 1;
 207
 208         if( !cv->custom_cb )
 209                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
 210
 211         if( nl_send_auto_complete(nls->nl_sock, cv->msg) < 0 )
 212                 goto err;
 213
 214         nl_cb_err(cv->cb,               NL_CB_CUSTOM, nl80211_msg_error,  &err);
 215         nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
 216         nl_cb_set(cv->cb, NL_CB_ACK,    NL_CB_CUSTOM, nl80211_msg_ack,    &err);
 217
 218         while (err > 0)
 219                 nl_recvmsgs(nls->nl_sock, cv->cb);
 220
 221         return &rcv;
 222
 223 err:
 224         nl_cb_put(cv->cb);
 225         nlmsg_free(cv->msg);
 226
 227         return NULL;
 228 }
 229
 230 static int nl80211_freq2channel(int freq)
 231 {
 232     if (freq == 2484)
 233         return 14;
 234
 235     if (freq < 2484)
 236         return (freq - 2407) / 5;
 237
 238     return (freq / 5) - 1000;
 239 }
 240
 241 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
 242 {
 243         int i, len;
 244         char lkey[64] = { 0 };
 245         const char *ln = buf;
 246         static char lval[256] = { 0 };
 247
 248         int matched_if = ifname ? 0 : 1;
 249
 250
 251         for( i = 0, len = strlen(buf); i < len; i++ )
 252         {
 253                 if( !lkey[0] && (buf[i] == ' ' || buf[i] == '\t') )
 254                 {
 255                         ln++;
 256                 }
 257                 else if( !lkey[0] && (buf[i] == '=') )
 258                 {
 259                         if( (&buf[i] - ln) > 0 )
 260                                 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
 261                 }
 262                 else if( buf[i] == '\n' )
 263                 {
 264                         if( lkey[0] )
 265                         {
 266                                 memcpy(lval, ln + strlen(lkey) + 1,
 267                                         min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
 268
 269                                 if( (ifname != NULL ) &&
 270                                     (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
 271                                 {
 272                                         matched_if = !strcmp(lval, ifname);
 273                                 }
 274                                 else if( matched_if && !strcmp(lkey, key) )
 275                                 {
 276                                         return lval;
 277                                 }
 278                         }
 279
 280                         ln = &buf[i+1];
 281                         memset(lkey, 0, sizeof(lkey));
 282                         memset(lval, 0, sizeof(lval));
 283                 }
 284         }
 285
 286         return NULL;
 287 }
 288
 289 static char * nl80211_ifname2phy(const char *ifname)
 290 {
 291         static char phy[32] = { 0 };
 292         struct nl80211_msg_conveyor *req, *res;
 293
 294         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
 295         if( req )
 296         {
 297                 res = nl80211_send(req);
 298                 if( res )
 299                 {
 300                         if( res->attr[NL80211_ATTR_WIPHY_NAME] )
 301                         {
 302                                 snprintf(phy, sizeof(phy), "%s",
 303                                          nla_get_string(res->attr[NL80211_ATTR_WIPHY_NAME]));
 304                         }
 305                         nl80211_free(res);
 306                 }
 307                 nl80211_free(req);
 308         }
 309
 310         return phy[0] ? phy : NULL;
 311 }
 312
 313 static char * nl80211_hostapd_info(const char *ifname)
 314 {
 315         char *phy;
 316         char path[32] = { 0 };
 317         static char buf[4096] = { 0 };
 318         FILE *conf;
 319
 320         if( (phy = nl80211_ifname2phy(ifname)) != NULL )
 321         {
 322                 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
 323
 324                 if( (conf = fopen(path, "r")) != NULL )
 325                 {
 326                         fread(buf, sizeof(buf) - 1, 1, conf);
 327                         fclose(conf);
 328
 329                         return buf;
 330                 }
 331         }
 332
 333         return NULL;
 334 }
 335
 336 static char * nl80211_wpasupp_info(const char *ifname, const char *cmd)
 337 {
 338         int sock = -1, len;
 339         char *rv = NULL;
 340         size_t remote_length, local_length;
 341         static char buffer[1024] = { 0 };
 342
 343         struct timeval tv = { 2, 0 };
 344         struct sockaddr_un local = { 0 };
 345         struct sockaddr_un remote = { 0 };
 346
 347         fd_set rfds;
 348
 349         sock = socket(PF_UNIX, SOCK_DGRAM, 0);
 350         if( sock < 0 )
 351                 return NULL;
 352
 353         remote.sun_family = AF_UNIX;
 354         remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
 355                 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
 356
 357         if( fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0 )
 358                 goto out;
 359
 360         if( connect(sock, (struct sockaddr *) &remote, remote_length) )
 361                 goto out;
 362
 363         local.sun_family = AF_UNIX;
 364         local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
 365                 "/var/run/iwinfo-%s-%d", ifname, getpid());
 366
 367         if( bind(sock, (struct sockaddr *) &local, local_length) )
 368                 goto out;
 369
 370         send(sock, cmd, strlen(cmd), 0);
 371
 372         while( 1 )
 373         {
 374                 FD_ZERO(&rfds);
 375                 FD_SET(sock, &rfds);
 376
 377                 if( select(sock + 1, &rfds, NULL, NULL, &tv) < 0 )
 378                         goto out;
 379
 380                 if( !FD_ISSET(sock, &rfds) )
 381                         break;
 382
 383                 if( (len = recv(sock, buffer, sizeof(buffer), 0)) <= 0 )
 384                         goto out;
 385
 386                 buffer[len] = 0;
 387
 388                 if( buffer[0] != '<' )
 389                         break;
 390         }
 391
 392         rv = buffer;
 393
 394 out:
 395         close(sock);
 396
 397         if( local.sun_family )
 398                 unlink(local.sun_path);
 399
 400         return rv;
 401 }
 402
 403 static char * nl80211_phy2ifname(const char *ifname)
 404 {
 405         int fd, phyidx = -1;
 406         char buffer[64];
 407         static char nif[IFNAMSIZ] = { 0 };
 408
 409         DIR *d;
 410         struct dirent *e;
 411
 412         if( !strncmp(ifname, "phy", 3) )
 413                 phyidx = atoi(&ifname[3]);
 414         else if( !strncmp(ifname, "radio", 5) )
 415                 phyidx = atoi(&ifname[5]);
 416
 417         if( phyidx > -1 )
 418         {
 419                 if( (d = opendir("/sys/class/net")) != NULL )
 420                 {
 421                         while( (e = readdir(d)) != NULL )
 422                         {
 423                                 snprintf(buffer, sizeof(buffer),
 424                                         "/sys/class/net/%s/phy80211/index", e->d_name);
 425
 426                                 if( (fd = open(buffer, O_RDONLY)) > 0 )
 427                                 {
 428                                         if( (read(fd, buffer, sizeof(buffer)) > 0) &&
 429                                             (atoi(buffer) == phyidx) )
 430                                         {
 431                                                 strncpy(nif, e->d_name, sizeof(nif));
 432                                         }
 433
 434                                         close(fd);
 435                                 }
 436
 437                                 if( nif[0] )
 438                                         break;
 439                         }
 440
 441                         closedir(d);
 442                 }
 443         }
 444
 445         return nif[0] ? nif : NULL;
 446 }
 447
 448 static char * nl80211_ifadd(const char *ifname)
 449 {
 450         int phyidx;
 451         char *rv = NULL;
 452         static char nif[IFNAMSIZ] = { 0 };
 453         struct nl80211_msg_conveyor *req, *res;
 454
 455         req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
 456         if( req )
 457         {
 458                 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
 459
 460                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
 461                 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
 462
 463                 res = nl80211_send(req);
 464                 if( res )
 465                 {
 466                         rv = nif;
 467                         nl80211_free(res);
 468                 }
 469
 470         nla_put_failure:
 471                 nl80211_free(req);
 472         }
 473
 474         return rv;
 475 }
 476
 477 static void nl80211_ifdel(const char *ifname)
 478 {
 479         struct nl80211_msg_conveyor *req;
 480
 481         req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
 482         if( req )
 483         {
 484                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
 485
 486                 nl80211_free(nl80211_send(req));
 487
 488         nla_put_failure:
 489                 nl80211_free(req);
 490         }
 491 }
 492
 493 static void nl80211_hostapd_hup(const char *ifname)
 494 {
 495         int fd, pid = 0;
 496         char buf[32];
 497         char *phy = nl80211_ifname2phy(ifname);
 498
 499         if( phy )
 500         {
 501                 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
 502                 if( (fd = open(buf, O_RDONLY)) > 0 )
 503                 {
 504                         if( read(fd, buf, sizeof(buf)) > 0 )
 505                                 pid = atoi(buf);
 506
 507                         close(fd);
 508                 }
 509
 510                 if( pid > 0 )
 511                         kill(pid, 1);
 512         }
 513 }
 514
 515
 516 int nl80211_probe(const char *ifname)
 517 {
 518         return !!nl80211_ifname2phy(ifname);
 519 }
 520
 521 void nl80211_close(void)
 522 {
 523         if( nls )
 524         {
 525                 if( nls->nl_sock )
 526                         nl_socket_free(nls->nl_sock);
 527
 528                 if( nls->nl_cache )
 529                         nl_cache_free(nls->nl_cache);
 530
 531                 free(nls);
 532                 nls = NULL;
 533         }
 534 }
 535
 536 int nl80211_get_mode(const char *ifname, char *buf)
 537 {
 538         return wext_get_mode(ifname, buf);
 539 }
 540
 541 int nl80211_get_ssid(const char *ifname, char *buf)
 542 {
 543         char *ssid;
 544
 545         if( !wext_get_ssid(ifname, buf) )
 546         {
 547                 return 0;
 548         }
 549         else if( (ssid = nl80211_hostapd_info(ifname)) &&
 550                  (ssid = nl80211_getval(ifname, ssid, "ssid")) )
 551         {
 552                 memcpy(buf, ssid, strlen(ssid));
 553                 return 0;
 554         }
 555
 556         return -1;
 557 }
 558
 559 int nl80211_get_bssid(const char *ifname, char *buf)
 560 {
 561         char *bssid;
 562         unsigned char mac[6];
 563
 564         if( !wext_get_bssid(ifname, buf) )
 565         {
 566                 return 0;
 567         }
 568         else if( (bssid = nl80211_hostapd_info(ifname)) &&
 569                  (bssid = nl80211_getval(ifname, bssid, "bssid")) )
 570         {
 571                 mac[0] = strtol(&bssid[0],  NULL, 16);
 572                 mac[1] = strtol(&bssid[3],  NULL, 16);
 573                 mac[2] = strtol(&bssid[6],  NULL, 16);
 574                 mac[3] = strtol(&bssid[9],  NULL, 16);
 575                 mac[4] = strtol(&bssid[12], NULL, 16);
 576                 mac[5] = strtol(&bssid[15], NULL, 16);
 577
 578                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
 579                         mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 580
 581                 return 0;
 582         }
 583
 584         return -1;
 585 }
 586
 587 int nl80211_get_channel(const char *ifname, int *buf)
 588 {
 589         return wext_get_channel(ifname, buf);
 590 }
 591
 592 int nl80211_get_frequency(const char *ifname, int *buf)
 593 {
 594         return wext_get_frequency(ifname, buf);
 595 }
 596
 597 int nl80211_get_txpower(const char *ifname, int *buf)
 598 {
 599         return wext_get_txpower(ifname, buf);
 600 }
 601
 602
 603 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
 604 {
 605         int8_t dbm;
 606         int16_t mbit;
 607         struct nl80211_rssi_rate *rr = arg;
 608
 609         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 610         struct nlattr *attr[NL80211_ATTR_MAX + 1];
 611         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
 612         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
 613
 614         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 615                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
 616                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
 617                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
 618                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
 619                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
 620                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
 621                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
 622                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
 623                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
 624                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
 625         };
 626
 627         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
 628                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
 629                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
 630                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
 631                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
 632         };
 633
 634         nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 635                   genlmsg_attrlen(gnlh, 0), NULL);
 636
 637         if( attr[NL80211_ATTR_STA_INFO] )
 638         {
 639                 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
 640                                 attr[NL80211_ATTR_STA_INFO], stats_policy) )
 641                 {
 642                         if( sinfo[NL80211_STA_INFO_SIGNAL] )
 643                         {
 644                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
 645                                 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
 646                         }
 647
 648                         if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
 649                         {
 650                                 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
 651                                                 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
 652                                 {
 653                                         if( rinfo[NL80211_RATE_INFO_BITRATE] )
 654                                         {
 655                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
 656                                                 rr->rate = rr->rate
 657                                                         ? (int16_t)((rr->rate + mbit) / 2) : mbit;
 658                                         }
 659                                 }
 660                         }
 661                 }
 662         }
 663
 664         return NL_SKIP;
 665 }
 666
 667 int nl80211_get_bitrate(const char *ifname, int *buf)
 668 {
 669         struct nl80211_rssi_rate rr;
 670         struct nl80211_msg_conveyor *req;
 671
 672         if( !wext_get_bitrate(ifname, buf) )
 673                 return 0;
 674
 675         req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
 676         if( req )
 677         {
 678                 rr.rssi = 0;
 679                 rr.rate = 0;
 680
 681                 nl80211_cb(req, nl80211_get_signal_cb, &rr);
 682                 nl80211_send(req);
 683                 nl80211_free(req);
 684
 685                 if( rr.rate )
 686                 {
 687                         *buf = (rr.rate * 100);
 688                         return 0;
 689                 }
 690         }
 691
 692         return -1;
 693 }
 694
 695 int nl80211_get_signal(const char *ifname, int *buf)
 696 {
 697         struct nl80211_rssi_rate rr;
 698         struct nl80211_msg_conveyor *req;
 699
 700         if( !wext_get_signal(ifname, buf) )
 701                 return 0;
 702
 703         req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
 704         if( req )
 705         {
 706                 rr.rssi = 0;
 707                 rr.rate = 0;
 708
 709                 nl80211_cb(req, nl80211_get_signal_cb, &rr);
 710                 nl80211_send(req);
 711                 nl80211_free(req);
 712
 713                 if( rr.rssi )
 714                 {
 715                         *buf = rr.rssi;
 716                         return 0;
 717                 }
 718         }
 719
 720         return -1;
 721 }
 722
 723 int nl80211_get_noise(const char *ifname, int *buf)
 724 {
 725         int rv = -1;
 726         struct nl80211_msg_conveyor *req, *res;
 727         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
 728
 729         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
 730                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
 731                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
 732         };
 733
 734         req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
 735         if( req )
 736         {
 737                 res = nl80211_send(req);
 738                 if( res )
 739                 {
 740                         if( res->attr[NL80211_ATTR_SURVEY_INFO] )
 741                         {
 742                                 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
 743                                                 res->attr[NL80211_ATTR_SURVEY_INFO], sp) &&
 744                                         si[NL80211_SURVEY_INFO_NOISE] )
 745                                 {
 746                                         *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
 747                                         rv = 0;
 748                                 }
 749                         }
 750                         nl80211_free(res);
 751                 }
 752                 nl80211_free(req);
 753         }
 754
 755         return rv;
 756 }
 757
 758 int nl80211_get_quality(const char *ifname, int *buf)
 759 {
 760         int signal;
 761
 762         if( wext_get_quality(ifname, buf) )
 763         {
 764                 *buf = 0;
 765
 766                 if( !nl80211_get_signal(ifname, &signal) )
 767                 {
 768                         /* A positive signal level is usually just a quality
 769                          * value, pass through as-is */
 770                         if( signal >= 0 )
 771                         {
 772                                 *buf = signal;
 773                         }
 774
 775                         /* The cfg80211 wext compat layer assumes a signal range
 776                          * of -110 dBm to -40 dBm, the quality value is derived
 777                          * by adding 110 to the signal level */
 778                         else
 779                         {
 780                                 if( signal < -110 )
 781                                         signal = -110;
 782                                 else if( signal > -40 )
 783                                         signal = -40;
 784
 785                                 *buf = (signal + 110);
 786                         }
 787                 }
 788         }
 789
 790         return 0;
 791 }
 792
 793 int nl80211_get_quality_max(const char *ifname, int *buf)
 794 {
 795         if( wext_get_quality_max(ifname, buf) )
 796                 /* The cfg80211 wext compat layer assumes a maximum
 797                  * quality of 70 */
 798                 *buf = 70;
 799
 800         return 0;
 801 }
 802
 803 int nl80211_get_encryption(const char *ifname, char *buf)
 804 {
 805         int i;
 806         char k[9];
 807         char *val, *res;
 808         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
 809
 810         /* Hostapd */
 811         if( (res = nl80211_hostapd_info(ifname)) )
 812         {
 813                 if( (val = nl80211_getval(ifname, res, "auth_algs")) && (val > 0) )
 814                 {
 815                         c->auth_suites |= IWINFO_KMGMT_NONE;
 816
 817                         switch(atoi(val)) {
 818                                 case 1:
 819                                         c->auth_algs |= IWINFO_AUTH_OPEN;
 820                                         break;
 821
 822                                 case 2:
 823                                         c->auth_algs |= IWINFO_AUTH_SHARED;
 824                                         break;
 825
 826                                 case 3:
 827                                         c->auth_algs |= IWINFO_AUTH_OPEN;
 828                                         c->auth_algs |= IWINFO_AUTH_SHARED;
 829                                         break;
 830
 831                                 default:
 832                                         break;
 833                         }
 834
 835                         for( i = 0; i < 4; i++ )
 836                         {
 837                                 snprintf(k, sizeof(k), "wep_key%d", i);
 838
 839                                 if( (val = nl80211_getval(ifname, res, k)) )
 840                                 {
 841                                         if( (strlen(val) == 5) || (strlen(val) == 10) )
 842                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
 843
 844                                         else if( (strlen(val) == 13) || (strlen(val) == 26) )
 845                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
 846                                 }
 847                         }
 848
 849                         c->group_ciphers = c->pair_ciphers;
 850
 851                         return 0;
 852                 }
 853
 854
 855                 if( (val = nl80211_getval(ifname, res, "wpa")) != NULL )
 856                         c->wpa_version = atoi(val);
 857
 858
 859                 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
 860
 861                 if( !val || strstr(val, "PSK") )
 862                         c->auth_suites |= IWINFO_KMGMT_PSK;
 863
 864                 if( val && strstr(val, "EAP") )
 865                         c->auth_suites |= IWINFO_KMGMT_8021x;
 866
 867                 if( val && strstr(val, "NONE") )
 868                         c->auth_suites |= IWINFO_KMGMT_NONE;
 869
 870
 871                 if( (val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL )
 872                 {
 873                         if( strstr(val, "TKIP") )
 874                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
 875
 876                         if( strstr(val, "CCMP") )
 877                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
 878
 879                         if( strstr(val, "NONE") )
 880                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
 881                 }
 882
 883
 884                 c->group_ciphers = c->pair_ciphers;
 885                 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
 886
 887                 return 0;
 888         }
 889
 890         /* WPA supplicant */
 891         else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
 892                  (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
 893         {
 894                 /* WEP */
 895                 if( strstr(val, "WEP") )
 896                 {
 897                         if( strstr(val, "WEP-40") )
 898                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
 899
 900                         else if( strstr(val, "WEP-104") )
 901                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
 902
 903                         c->enabled       = 1;
 904                         c->group_ciphers = c->pair_ciphers;
 905
 906                         c->auth_suites |= IWINFO_KMGMT_NONE;
 907                         c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
 908                 }
 909
 910                 /* WPA */
 911                 else
 912                 {
 913                         if( strstr(val, "TKIP") )
 914                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
 915
 916                         else if( strstr(val, "CCMP") )
 917                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
 918
 919                         else if( strstr(val, "NONE") )
 920                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
 921
 922                         else if( strstr(val, "WEP-40") )
 923                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
 924
 925                         else if( strstr(val, "WEP-104") )
 926                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
 927
 928
 929                         if( (val = nl80211_getval(NULL, res, "group_cipher")) )
 930                         {
 931                                 if( strstr(val, "TKIP") )
 932                                         c->group_ciphers |= IWINFO_CIPHER_TKIP;
 933
 934                                 else if( strstr(val, "CCMP") )
 935                                         c->group_ciphers |= IWINFO_CIPHER_CCMP;
 936
 937                                 else if( strstr(val, "NONE") )
 938                                         c->group_ciphers |= IWINFO_CIPHER_NONE;
 939
 940                                 else if( strstr(val, "WEP-40") )
 941                                         c->group_ciphers |= IWINFO_CIPHER_WEP40;
 942
 943                                 else if( strstr(val, "WEP-104") )
 944                                         c->group_ciphers |= IWINFO_CIPHER_WEP104;
 945                         }
 946
 947
 948                         if( (val = nl80211_getval(NULL, res, "key_mgmt")) )
 949                         {
 950                                 if( strstr(val, "WPA2") )
 951                                         c->wpa_version = 2;
 952
 953                                 else if( strstr(val, "WPA") )
 954                                         c->wpa_version = 1;
 955
 956
 957                                 if( strstr(val, "PSK") )
 958                                         c->auth_suites |= IWINFO_KMGMT_PSK;
 959
 960                                 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
 961                                         c->auth_suites |= IWINFO_KMGMT_8021x;
 962
 963                                 else if( strstr(val, "NONE") )
 964                                         c->auth_suites |= IWINFO_KMGMT_NONE;
 965                         }
 966
 967                         c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
 968                 }
 969
 970                 return 0;
 971         }
 972
 973         return -1;
 974 }
 975
 976
 977 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
 978 {
 979         struct nl80211_assoc_count *ac = arg;
 980         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 981         struct nlattr *attr[NL80211_ATTR_MAX + 1];
 982         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
 983
 984         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 985                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
 986                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
 987                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
 988                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
 989                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
 990                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
 991                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
 992                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
 993                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
 994                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
 995         };
 996
 997         nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 998                 genlmsg_attrlen(gnlh, 0), NULL);
 999
1000         if( attr[NL80211_ATTR_MAC] )
1001                 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1002
1003         if( attr[NL80211_ATTR_STA_INFO] )
1004         {
1005                 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1006                                 attr[NL80211_ATTR_STA_INFO], stats_policy) )
1007                 {
1008                         if( sinfo[NL80211_STA_INFO_SIGNAL] )
1009                                 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1010                 }
1011         }
1012
1013         ac->entry->noise = ac->noise;
1014         ac->entry++;
1015         ac->count++;
1016
1017         return NL_SKIP;
1018 }
1019
1020 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1021 {
1022         struct nl80211_assoc_count ac;
1023         struct nl80211_msg_conveyor *req;
1024
1025         nl80211_get_noise(ifname, &ac.noise);
1026
1027         req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
1028         if( req )
1029         {
1030                 ac.count = 0;
1031                 ac.entry = (struct iwinfo_assoclist_entry *)buf;
1032
1033                 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
1034                 nl80211_send(req);
1035                 nl80211_free(req);
1036
1037                 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
1038                 return 0;
1039         }
1040
1041         return -1;
1042 }
1043
1044 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1045 {
1046         int ch_cur, ch_cmp, bands_remain, freqs_remain;
1047         int dbm_max = -1, dbm_cur, dbm_cnt;
1048         struct nl80211_msg_conveyor *req, *res;
1049         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1050         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1051         struct nlattr *band, *freq;
1052         struct iwinfo_txpwrlist_entry entry;
1053
1054         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1055                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1056                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1057                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1058                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1059                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1060                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1061         };
1062
1063         if( nl80211_get_channel(ifname, &ch_cur) )
1064                 ch_cur = 0;
1065
1066         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1067         if( req )
1068         {
1069                 res = nl80211_send(req);
1070                 if( res )
1071                 {
1072                         nla_for_each_nested(band,
1073                                 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1074                         {
1075                                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1076                                           nla_len(band), NULL);
1077
1078                                 nla_for_each_nested(freq,
1079                                         bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1080                                 {
1081                                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1082                                                 nla_data(freq), nla_len(freq), freq_policy);
1083
1084                                         ch_cmp = nl80211_freq2channel(
1085                                                 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1086
1087                                         if( (!ch_cur || (ch_cmp == ch_cur)) &&
1088                                             freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1089                                         {
1090                                                 dbm_max = (int)(0.01 * nla_get_u32(
1091                                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1092
1093                                                 break;
1094                                         }
1095                                 }
1096                         }
1097
1098                         nl80211_free(res);
1099                 }
1100                 nl80211_free(req);
1101         }
1102
1103         if( dbm_max > -1 )
1104         {
1105                 for( dbm_cur = 0, dbm_cnt = 0;
1106                      dbm_cur < dbm_max;
1107                      dbm_cur += 2, dbm_cnt++ )
1108                 {
1109                         entry.dbm = dbm_cur;
1110                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
1111
1112                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1113                 }
1114
1115                 entry.dbm = dbm_max;
1116                 entry.mw  = iwinfo_dbm2mw(dbm_max);
1117
1118                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1119                 dbm_cnt++;
1120
1121                 *len = dbm_cnt * sizeof(entry);
1122                 return 0;
1123         }
1124
1125         return -1;
1126 }
1127
1128 static void nl80211_get_scancrypto(const char *spec,
1129         struct iwinfo_crypto_entry *c)
1130 {
1131         if( strstr(spec, "OPEN") )
1132         {
1133                 c->enabled = 0;
1134         }
1135         else
1136         {
1137                 c->enabled = 1;
1138
1139                 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
1140                         c->wpa_version = 3;
1141
1142                 else if( strstr(spec, "WPA2") )
1143                         c->wpa_version = 2;
1144
1145                 else if( strstr(spec, "WPA") )
1146                         c->wpa_version = 1;
1147
1148                 else if( strstr(spec, "WEP") )
1149                         c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1150
1151
1152                 if( strstr(spec, "PSK") )
1153                         c->auth_suites |= IWINFO_KMGMT_PSK;
1154
1155                 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1156                         c->auth_suites |= IWINFO_KMGMT_8021x;
1157
1158                 if( strstr(spec, "WPA-NONE") )
1159                         c->auth_suites |= IWINFO_KMGMT_NONE;
1160
1161
1162                 if( strstr(spec, "TKIP") )
1163                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1164
1165                 if( strstr(spec, "CCMP") )
1166                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1167
1168                 if( strstr(spec, "WEP-40") )
1169                         c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1170
1171                 if( strstr(spec, "WEP-104") )
1172                         c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1173
1174                 c->group_ciphers = c->pair_ciphers;
1175         }
1176 }
1177
1178 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1179 {
1180         int freq, rssi, qmax, count;
1181         char *res;
1182         char ssid[128] = { 0 };
1183         char bssid[18] = { 0 };
1184         char cipher[256] = { 0 };
1185
1186         /* Got a radioX pseudo interface, find some interface on it or create one */
1187         if( !strncmp(ifname, "radio", 5) )
1188         {
1189                 /* Reuse existing interface */
1190                 if( (res = nl80211_phy2ifname(ifname)) != NULL )
1191                 {
1192                         return nl80211_get_scanlist(res, buf, len);
1193                 }
1194
1195                 /* Need to spawn a temporary iface for scanning */
1196                 else if( (res = nl80211_ifadd(ifname)) != NULL )
1197                 {
1198                         count = nl80211_get_scanlist(res, buf, len);
1199                         nl80211_ifdel(res);
1200                         return count;
1201                 }
1202         }
1203
1204         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1205
1206         /* WPA supplicant */
1207         if( (res = nl80211_wpasupp_info(ifname, "SCAN")) && !strcmp(res, "OK\n") )
1208         {
1209                 sleep(2);
1210
1211                 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1212                 {
1213                         nl80211_get_quality_max(ifname, &qmax);
1214
1215                         /* skip header line */
1216                         while( *res++ != '\n' );
1217
1218                         count = 0;
1219
1220                         while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1221                                       bssid, &freq, &rssi, cipher, ssid) > 0 )
1222                         {
1223                                 /* BSSID */
1224                                 e->mac[0] = strtol(&bssid[0],  NULL, 16);
1225                                 e->mac[1] = strtol(&bssid[3],  NULL, 16);
1226                                 e->mac[2] = strtol(&bssid[6],  NULL, 16);
1227                                 e->mac[3] = strtol(&bssid[9],  NULL, 16);
1228                                 e->mac[4] = strtol(&bssid[12], NULL, 16);
1229                                 e->mac[5] = strtol(&bssid[15], NULL, 16);
1230
1231                                 /* SSID */
1232                                 memcpy(e->ssid, ssid,
1233                                         min(strlen(ssid), sizeof(e->ssid) - 1));
1234
1235                                 /* Mode (assume master) */
1236                                 sprintf((char *)e->mode, "Master");
1237
1238                                 /* Channel */
1239                                 e->channel = nl80211_freq2channel(freq);
1240
1241                                 /* Signal */
1242                                 e->signal = rssi;
1243
1244                                 /* Quality */
1245                                 if( rssi < 0 )
1246                                 {
1247                                         /* The cfg80211 wext compat layer assumes a signal range
1248                                          * of -110 dBm to -40 dBm, the quality value is derived
1249                                          * by adding 110 to the signal level */
1250                                         if( rssi < -110 )
1251                                                 rssi = -110;
1252                                         else if( rssi > -40 )
1253                                                 rssi = -40;
1254
1255                                         e->quality = (rssi + 110);
1256                                 }
1257                                 else
1258                                 {
1259                                         e->quality = rssi;
1260                                 }
1261
1262                                 /* Max. Quality */
1263                                 e->quality_max = qmax;
1264
1265                                 /* Crypto */
1266                                 nl80211_get_scancrypto(cipher, &e->crypto);
1267
1268                                 /* advance to next line */
1269                                 while( *res && *res++ != '\n' );
1270
1271                                 count++;
1272                                 e++;
1273                         }
1274
1275                         *len = count * sizeof(struct iwinfo_scanlist_entry);
1276                         return 0;
1277                 }
1278         }
1279
1280         /* AP scan */
1281         else
1282         {
1283                 /* Got a temp interface, don't create yet another one */
1284                 if( !strncmp(ifname, "tmp.", 4) )
1285                 {
1286                         if( !iwinfo_ifup(ifname) )
1287                                 return -1;
1288
1289                         wext_get_scanlist(ifname, buf, len);
1290                         iwinfo_ifdown(ifname);
1291                         return 0;
1292                 }
1293
1294                 /* Spawn a new scan interface */
1295                 else
1296                 {
1297                         if( !(res = nl80211_ifadd(ifname)) )
1298                                 goto out;
1299
1300                         if( !iwinfo_ifmac(res) )
1301                                 goto out;
1302
1303                         /* if we can take the new interface up, the driver supports an
1304                          * additional interface and there's no need to tear down the ap */
1305                         if( iwinfo_ifup(res) )
1306                         {
1307                                 wext_get_scanlist(res, buf, len);
1308                                 iwinfo_ifdown(res);
1309                         }
1310
1311                         /* driver cannot create secondary interface, take down ap
1312                          * during scan */
1313                         else if( iwinfo_ifdown(ifname) && iwinfo_ifup(res) )
1314                         {
1315                                 wext_get_scanlist(res, buf, len);
1316                                 iwinfo_ifdown(res);
1317                                 iwinfo_ifup(ifname);
1318                                 nl80211_hostapd_hup(ifname);
1319                         }
1320
1321                 out:
1322                         nl80211_ifdel(res);
1323                         return 0;
1324                 }
1325         }
1326
1327         return -1;
1328 }
1329
1330 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1331 {
1332         int count = 0, bands_remain, freqs_remain;
1333         struct nl80211_msg_conveyor *req, *res;
1334         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1335         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1336         struct nlattr *band, *freq;
1337         struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1338
1339         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1340         if( req )
1341         {
1342                 res = nl80211_send(req);
1343                 if( res )
1344                 {
1345                         nla_for_each_nested(band,
1346                                 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1347                         {
1348                                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1349                                           nla_len(band), NULL);
1350
1351                                 nla_for_each_nested(freq,
1352                                         bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1353                                 {
1354                                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1355                                                 nla_data(freq), nla_len(freq), NULL);
1356
1357                                         if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1358                                             freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1359                                                 continue;
1360
1361                                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1362                                         e->channel = nl80211_freq2channel(e->mhz);
1363
1364                                         e->restricted = (
1365                                                 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1366                                                 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS]      ||
1367                                                 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1368                                         ) ? 1 : 0;
1369
1370                                         e++;
1371                                         count++;
1372                                 }
1373                         }
1374                         nl80211_free(res);
1375                 }
1376                 nl80211_free(req);
1377         }
1378
1379         if( count > 0 )
1380         {
1381                 *len = count * sizeof(struct iwinfo_freqlist_entry);
1382                 return 0;
1383         }
1384
1385         return -1;
1386 }
1387
1388 int nl80211_get_country(const char *ifname, char *buf)
1389 {
1390         int rv = -1;
1391         struct nl80211_msg_conveyor *req, *res;
1392
1393         req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1394         if( req )
1395         {
1396                 res = nl80211_send(req);
1397                 if( res )
1398                 {
1399                         if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1400                         {
1401                                 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1402                                 rv = 0;
1403                         }
1404                         nl80211_free(res);
1405                 }
1406                 nl80211_free(req);
1407         }
1408
1409         return rv;
1410 }
1411
1412 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1413 {
1414         int i, count;
1415         struct iwinfo_iso3166_label *l;
1416         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1417
1418         for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1419         {
1420                 e->iso3166 = l->iso3166;
1421                 e->ccode[0] = (l->iso3166 / 256);
1422                 e->ccode[1] = (l->iso3166 % 256);
1423         }
1424
1425         *len = (count * sizeof(struct iwinfo_country_entry));
1426         return 0;
1427 }
1428
1429 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1430 {
1431         int bands_remain, freqs_remain;
1432         struct nl80211_msg_conveyor *req, *res;
1433         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1434         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1435         struct nlattr *band, *freq;
1436         uint16_t caps = 0;
1437
1438         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1439         if( req )
1440         {
1441                 res = nl80211_send(req);
1442                 if( res )
1443                 {
1444                         nla_for_each_nested(band,
1445                                 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1446                         {
1447                                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1448                                           nla_len(band), NULL);
1449
1450                                 if( bands[NL80211_BAND_ATTR_HT_CAPA] )
1451                                         caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1452
1453                                 /* Treat any nonzero capability as 11n */
1454                                 if( caps > 0 )
1455                                         *buf |= IWINFO_80211_N;
1456
1457                                 nla_for_each_nested(freq,
1458                                         bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1459                                 {
1460                                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1461                                                 nla_data(freq), nla_len(freq), NULL);
1462
1463                                         if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] )
1464                                                 continue;
1465
1466                                         if( nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485 )
1467                                         {
1468                                                 *buf |= IWINFO_80211_B;
1469                                                 *buf |= IWINFO_80211_G;
1470                                         }
1471                                         else
1472                                         {
1473                                                 *buf |= IWINFO_80211_A;
1474                                         }
1475                                 }
1476                         }
1477                         nl80211_free(res);
1478                 }
1479                 nl80211_free(req);
1480         }
1481
1482         return *buf ? 0 : -1;
1483 }
1484
1485 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1486 {
1487         /* Test whether we can create another interface */
1488         char *nif = nl80211_ifadd(ifname);
1489
1490         if( nif )
1491         {
1492                 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
1493
1494                 iwinfo_ifdown(nif);
1495                 nl80211_ifdel(nif);
1496
1497                 return 0;
1498         }
1499
1500         return -1;
1501 }