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 inline int nl80211_readint(const char *path)
 404 {
 405         int fd;
 406         int rv = -1;
 407         char buffer[16];
 408
 409         if( (fd = open(path, O_RDONLY)) > -1 )
 410         {
 411                 if( read(fd, buffer, sizeof(buffer)) > 0 )
 412                         rv = atoi(buffer);
 413
 414                 close(fd);
 415         }
 416
 417         return rv;
 418 }
 419
 420 static char * nl80211_phy2ifname(const char *ifname)
 421 {
 422         int fd, ifidx = -1, cifidx = -1, phyidx = -1;
 423         char buffer[64];
 424         static char nif[IFNAMSIZ] = { 0 };
 425
 426         DIR *d;
 427         struct dirent *e;
 428
 429         if( !strncmp(ifname, "phy", 3) )
 430                 phyidx = atoi(&ifname[3]);
 431         else if( !strncmp(ifname, "radio", 5) )
 432                 phyidx = atoi(&ifname[5]);
 433
 434         if( phyidx > -1 )
 435         {
 436                 if( (d = opendir("/sys/class/net")) != NULL )
 437                 {
 438                         while( (e = readdir(d)) != NULL )
 439                         {
 440                                 snprintf(buffer, sizeof(buffer),
 441                                         "/sys/class/net/%s/phy80211/index", e->d_name);
 442
 443                                 if( nl80211_readint(buffer) == phyidx )
 444                                 {
 445                                         snprintf(buffer, sizeof(buffer),
 446                                                 "/sys/class/net/%s/ifindex", e->d_name);
 447
 448                                         if( (cifidx = nl80211_readint(buffer)) >= 0 &&
 449                                             ((ifidx < 0) || (cifidx < ifidx)) )
 450                                         {
 451                                                 ifidx = cifidx;
 452                                                 strncpy(nif, e->d_name, sizeof(nif));
 453                                         }
 454                                 }
 455                         }
 456
 457                         closedir(d);
 458                 }
 459         }
 460
 461         return nif[0] ? nif : NULL;
 462 }
 463
 464 static char * nl80211_ifadd(const char *ifname)
 465 {
 466         int phyidx;
 467         char *rv = NULL;
 468         static char nif[IFNAMSIZ] = { 0 };
 469         struct nl80211_msg_conveyor *req, *res;
 470
 471         req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
 472         if( req )
 473         {
 474                 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
 475
 476                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
 477                 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
 478
 479                 res = nl80211_send(req);
 480                 if( res )
 481                 {
 482                         rv = nif;
 483                         nl80211_free(res);
 484                 }
 485
 486         nla_put_failure:
 487                 nl80211_free(req);
 488         }
 489
 490         return rv;
 491 }
 492
 493 static void nl80211_ifdel(const char *ifname)
 494 {
 495         struct nl80211_msg_conveyor *req;
 496
 497         req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
 498         if( req )
 499         {
 500                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
 501
 502                 nl80211_free(nl80211_send(req));
 503
 504         nla_put_failure:
 505                 nl80211_free(req);
 506         }
 507 }
 508
 509 static void nl80211_hostapd_hup(const char *ifname)
 510 {
 511         int fd, pid = 0;
 512         char buf[32];
 513         char *phy = nl80211_ifname2phy(ifname);
 514
 515         if( phy )
 516         {
 517                 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
 518                 if( (fd = open(buf, O_RDONLY)) > 0 )
 519                 {
 520                         if( read(fd, buf, sizeof(buf)) > 0 )
 521                                 pid = atoi(buf);
 522
 523                         close(fd);
 524                 }
 525
 526                 if( pid > 0 )
 527                         kill(pid, 1);
 528         }
 529 }
 530
 531
 532 int nl80211_probe(const char *ifname)
 533 {
 534         return !!nl80211_ifname2phy(ifname);
 535 }
 536
 537 void nl80211_close(void)
 538 {
 539         if( nls )
 540         {
 541                 if( nls->nl_sock )
 542                         nl_socket_free(nls->nl_sock);
 543
 544                 if( nls->nl_cache )
 545                         nl_cache_free(nls->nl_cache);
 546
 547                 free(nls);
 548                 nls = NULL;
 549         }
 550 }
 551
 552 int nl80211_get_mode(const char *ifname, char *buf)
 553 {
 554         return wext_get_mode(ifname, buf);
 555 }
 556
 557 int nl80211_get_ssid(const char *ifname, char *buf)
 558 {
 559         char *ssid;
 560
 561         if( !wext_get_ssid(ifname, buf) )
 562         {
 563                 return 0;
 564         }
 565         else if( (ssid = nl80211_hostapd_info(ifname)) &&
 566                  (ssid = nl80211_getval(ifname, ssid, "ssid")) )
 567         {
 568                 memcpy(buf, ssid, strlen(ssid));
 569                 return 0;
 570         }
 571
 572         return -1;
 573 }
 574
 575 int nl80211_get_bssid(const char *ifname, char *buf)
 576 {
 577         char *bssid;
 578         unsigned char mac[6];
 579
 580         if( !wext_get_bssid(ifname, buf) )
 581         {
 582                 return 0;
 583         }
 584         else if( (bssid = nl80211_hostapd_info(ifname)) &&
 585                  (bssid = nl80211_getval(ifname, bssid, "bssid")) )
 586         {
 587                 mac[0] = strtol(&bssid[0],  NULL, 16);
 588                 mac[1] = strtol(&bssid[3],  NULL, 16);
 589                 mac[2] = strtol(&bssid[6],  NULL, 16);
 590                 mac[3] = strtol(&bssid[9],  NULL, 16);
 591                 mac[4] = strtol(&bssid[12], NULL, 16);
 592                 mac[5] = strtol(&bssid[15], NULL, 16);
 593
 594                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
 595                         mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 596
 597                 return 0;
 598         }
 599
 600         return -1;
 601 }
 602
 603 int nl80211_get_channel(const char *ifname, int *buf)
 604 {
 605         char *first;
 606
 607         if( wext_get_channel(ifname, buf) &&
 608             NULL != (first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) )
 609         {
 610                 return wext_get_channel(first, buf);
 611         }
 612
 613         return -1;
 614 }
 615
 616 int nl80211_get_frequency(const char *ifname, int *buf)
 617 {
 618         char *first;
 619
 620         if( wext_get_channel(ifname, buf) &&
 621             NULL != (first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) )
 622         {
 623                 return wext_get_frequency(first, buf);
 624         }
 625
 626         return -1;
 627 }
 628
 629 int nl80211_get_txpower(const char *ifname, int *buf)
 630 {
 631         return wext_get_txpower(ifname, buf);
 632 }
 633
 634
 635 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
 636 {
 637         int8_t dbm;
 638         int16_t mbit;
 639         struct nl80211_rssi_rate *rr = arg;
 640
 641         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 642         struct nlattr *attr[NL80211_ATTR_MAX + 1];
 643         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
 644         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
 645
 646         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 647                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
 648                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
 649                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
 650                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
 651                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
 652                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
 653                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
 654                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
 655                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
 656                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
 657         };
 658
 659         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
 660                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
 661                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
 662                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
 663                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
 664         };
 665
 666         nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 667                   genlmsg_attrlen(gnlh, 0), NULL);
 668
 669         if( attr[NL80211_ATTR_STA_INFO] )
 670         {
 671                 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
 672                                 attr[NL80211_ATTR_STA_INFO], stats_policy) )
 673                 {
 674                         if( sinfo[NL80211_STA_INFO_SIGNAL] )
 675                         {
 676                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
 677                                 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
 678                         }
 679
 680                         if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
 681                         {
 682                                 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
 683                                                 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
 684                                 {
 685                                         if( rinfo[NL80211_RATE_INFO_BITRATE] )
 686                                         {
 687                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
 688                                                 rr->rate = rr->rate
 689                                                         ? (int16_t)((rr->rate + mbit) / 2) : mbit;
 690                                         }
 691                                 }
 692                         }
 693                 }
 694         }
 695
 696         return NL_SKIP;
 697 }
 698
 699 int nl80211_get_bitrate(const char *ifname, int *buf)
 700 {
 701         struct nl80211_rssi_rate rr;
 702         struct nl80211_msg_conveyor *req;
 703
 704         if( !wext_get_bitrate(ifname, buf) )
 705                 return 0;
 706
 707         req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
 708         if( req )
 709         {
 710                 rr.rssi = 0;
 711                 rr.rate = 0;
 712
 713                 nl80211_cb(req, nl80211_get_signal_cb, &rr);
 714                 nl80211_send(req);
 715                 nl80211_free(req);
 716
 717                 if( rr.rate )
 718                 {
 719                         *buf = (rr.rate * 100);
 720                         return 0;
 721                 }
 722         }
 723
 724         return -1;
 725 }
 726
 727 int nl80211_get_signal(const char *ifname, int *buf)
 728 {
 729         struct nl80211_rssi_rate rr;
 730         struct nl80211_msg_conveyor *req;
 731
 732         if( !wext_get_signal(ifname, buf) )
 733                 return 0;
 734
 735         req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
 736         if( req )
 737         {
 738                 rr.rssi = 0;
 739                 rr.rate = 0;
 740
 741                 nl80211_cb(req, nl80211_get_signal_cb, &rr);
 742                 nl80211_send(req);
 743                 nl80211_free(req);
 744
 745                 if( rr.rssi )
 746                 {
 747                         *buf = rr.rssi;
 748                         return 0;
 749                 }
 750         }
 751
 752         return -1;
 753 }
 754
 755 int nl80211_get_noise(const char *ifname, int *buf)
 756 {
 757         int rv = -1;
 758         struct nl80211_msg_conveyor *req, *res;
 759         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
 760
 761         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
 762                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
 763                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
 764         };
 765
 766         req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
 767         if( req )
 768         {
 769                 res = nl80211_send(req);
 770                 if( res )
 771                 {
 772                         if( res->attr[NL80211_ATTR_SURVEY_INFO] )
 773                         {
 774                                 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
 775                                                 res->attr[NL80211_ATTR_SURVEY_INFO], sp) &&
 776                                         si[NL80211_SURVEY_INFO_NOISE] )
 777                                 {
 778                                         *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
 779                                         rv = 0;
 780                                 }
 781                         }
 782                         nl80211_free(res);
 783                 }
 784                 nl80211_free(req);
 785         }
 786
 787         return rv;
 788 }
 789
 790 int nl80211_get_quality(const char *ifname, int *buf)
 791 {
 792         int signal;
 793
 794         if( wext_get_quality(ifname, buf) )
 795         {
 796                 *buf = 0;
 797
 798                 if( !nl80211_get_signal(ifname, &signal) )
 799                 {
 800                         /* A positive signal level is usually just a quality
 801                          * value, pass through as-is */
 802                         if( signal >= 0 )
 803                         {
 804                                 *buf = signal;
 805                         }
 806
 807                         /* The cfg80211 wext compat layer assumes a signal range
 808                          * of -110 dBm to -40 dBm, the quality value is derived
 809                          * by adding 110 to the signal level */
 810                         else
 811                         {
 812                                 if( signal < -110 )
 813                                         signal = -110;
 814                                 else if( signal > -40 )
 815                                         signal = -40;
 816
 817                                 *buf = (signal + 110);
 818                         }
 819                 }
 820         }
 821
 822         return 0;
 823 }
 824
 825 int nl80211_get_quality_max(const char *ifname, int *buf)
 826 {
 827         if( wext_get_quality_max(ifname, buf) )
 828                 /* The cfg80211 wext compat layer assumes a maximum
 829                  * quality of 70 */
 830                 *buf = 70;
 831
 832         return 0;
 833 }
 834
 835 int nl80211_get_encryption(const char *ifname, char *buf)
 836 {
 837         int i;
 838         char k[9];
 839         char *val, *res;
 840         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
 841
 842         /* Hostapd */
 843         if( (res = nl80211_hostapd_info(ifname)) )
 844         {
 845                 if( (val = nl80211_getval(ifname, res, "auth_algs")) && (val > 0) )
 846                 {
 847                         c->auth_suites |= IWINFO_KMGMT_NONE;
 848
 849                         switch(atoi(val)) {
 850                                 case 1:
 851                                         c->auth_algs |= IWINFO_AUTH_OPEN;
 852                                         break;
 853
 854                                 case 2:
 855                                         c->auth_algs |= IWINFO_AUTH_SHARED;
 856                                         break;
 857
 858                                 case 3:
 859                                         c->auth_algs |= IWINFO_AUTH_OPEN;
 860                                         c->auth_algs |= IWINFO_AUTH_SHARED;
 861                                         break;
 862
 863                                 default:
 864                                         break;
 865                         }
 866
 867                         for( i = 0; i < 4; i++ )
 868                         {
 869                                 snprintf(k, sizeof(k), "wep_key%d", i);
 870
 871                                 if( (val = nl80211_getval(ifname, res, k)) )
 872                                 {
 873                                         if( (strlen(val) == 5) || (strlen(val) == 10) )
 874                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
 875
 876                                         else if( (strlen(val) == 13) || (strlen(val) == 26) )
 877                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
 878                                 }
 879                         }
 880
 881                         c->group_ciphers = c->pair_ciphers;
 882
 883                         return 0;
 884                 }
 885
 886
 887                 if( (val = nl80211_getval(ifname, res, "wpa")) != NULL )
 888                         c->wpa_version = atoi(val);
 889
 890
 891                 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
 892
 893                 if( !val || strstr(val, "PSK") )
 894                         c->auth_suites |= IWINFO_KMGMT_PSK;
 895
 896                 if( val && strstr(val, "EAP") )
 897                         c->auth_suites |= IWINFO_KMGMT_8021x;
 898
 899                 if( val && strstr(val, "NONE") )
 900                         c->auth_suites |= IWINFO_KMGMT_NONE;
 901
 902
 903                 if( (val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL )
 904                 {
 905                         if( strstr(val, "TKIP") )
 906                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
 907
 908                         if( strstr(val, "CCMP") )
 909                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
 910
 911                         if( strstr(val, "NONE") )
 912                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
 913                 }
 914
 915
 916                 c->group_ciphers = c->pair_ciphers;
 917                 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
 918
 919                 return 0;
 920         }
 921
 922         /* WPA supplicant */
 923         else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
 924                  (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
 925         {
 926                 /* WEP */
 927                 if( strstr(val, "WEP") )
 928                 {
 929                         if( strstr(val, "WEP-40") )
 930                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
 931
 932                         else if( strstr(val, "WEP-104") )
 933                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
 934
 935                         c->enabled       = 1;
 936                         c->group_ciphers = c->pair_ciphers;
 937
 938                         c->auth_suites |= IWINFO_KMGMT_NONE;
 939                         c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
 940                 }
 941
 942                 /* WPA */
 943                 else
 944                 {
 945                         if( strstr(val, "TKIP") )
 946                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
 947
 948                         else if( strstr(val, "CCMP") )
 949                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
 950
 951                         else if( strstr(val, "NONE") )
 952                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
 953
 954                         else if( strstr(val, "WEP-40") )
 955                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
 956
 957                         else if( strstr(val, "WEP-104") )
 958                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
 959
 960
 961                         if( (val = nl80211_getval(NULL, res, "group_cipher")) )
 962                         {
 963                                 if( strstr(val, "TKIP") )
 964                                         c->group_ciphers |= IWINFO_CIPHER_TKIP;
 965
 966                                 else if( strstr(val, "CCMP") )
 967                                         c->group_ciphers |= IWINFO_CIPHER_CCMP;
 968
 969                                 else if( strstr(val, "NONE") )
 970                                         c->group_ciphers |= IWINFO_CIPHER_NONE;
 971
 972                                 else if( strstr(val, "WEP-40") )
 973                                         c->group_ciphers |= IWINFO_CIPHER_WEP40;
 974
 975                                 else if( strstr(val, "WEP-104") )
 976                                         c->group_ciphers |= IWINFO_CIPHER_WEP104;
 977                         }
 978
 979
 980                         if( (val = nl80211_getval(NULL, res, "key_mgmt")) )
 981                         {
 982                                 if( strstr(val, "WPA2") )
 983                                         c->wpa_version = 2;
 984
 985                                 else if( strstr(val, "WPA") )
 986                                         c->wpa_version = 1;
 987
 988
 989                                 if( strstr(val, "PSK") )
 990                                         c->auth_suites |= IWINFO_KMGMT_PSK;
 991
 992                                 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
 993                                         c->auth_suites |= IWINFO_KMGMT_8021x;
 994
 995                                 else if( strstr(val, "NONE") )
 996                                         c->auth_suites |= IWINFO_KMGMT_NONE;
 997                         }
 998
 999                         c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1000                 }
1001
1002                 return 0;
1003         }
1004
1005         return -1;
1006 }
1007
1008
1009 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1010 {
1011         struct nl80211_assoc_count *ac = arg;
1012         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1013         struct nlattr *attr[NL80211_ATTR_MAX + 1];
1014         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1015
1016         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1017                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1018                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1019                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1020                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1021                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1022                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1023                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1024                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1025                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1026                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1027         };
1028
1029         nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1030                 genlmsg_attrlen(gnlh, 0), NULL);
1031
1032         if( attr[NL80211_ATTR_MAC] )
1033                 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1034
1035         if( attr[NL80211_ATTR_STA_INFO] )
1036         {
1037                 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1038                                 attr[NL80211_ATTR_STA_INFO], stats_policy) )
1039                 {
1040                         if( sinfo[NL80211_STA_INFO_SIGNAL] )
1041                                 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1042                 }
1043         }
1044
1045         ac->entry->noise = ac->noise;
1046         ac->entry++;
1047         ac->count++;
1048
1049         return NL_SKIP;
1050 }
1051
1052 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1053 {
1054         struct nl80211_assoc_count ac;
1055         struct nl80211_msg_conveyor *req;
1056
1057         nl80211_get_noise(ifname, &ac.noise);
1058
1059         req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
1060         if( req )
1061         {
1062                 ac.count = 0;
1063                 ac.entry = (struct iwinfo_assoclist_entry *)buf;
1064
1065                 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
1066                 nl80211_send(req);
1067                 nl80211_free(req);
1068
1069                 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
1070                 return 0;
1071         }
1072
1073         return -1;
1074 }
1075
1076 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1077 {
1078         int ch_cur, ch_cmp, bands_remain, freqs_remain;
1079         int dbm_max = -1, dbm_cur, dbm_cnt;
1080         struct nl80211_msg_conveyor *req, *res;
1081         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1082         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1083         struct nlattr *band, *freq;
1084         struct iwinfo_txpwrlist_entry entry;
1085
1086         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1087                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1088                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1089                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1090                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1091                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1092                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1093         };
1094
1095         if( nl80211_get_channel(ifname, &ch_cur) )
1096                 ch_cur = 0;
1097
1098         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1099         if( req )
1100         {
1101                 res = nl80211_send(req);
1102                 if( res )
1103                 {
1104                         nla_for_each_nested(band,
1105                                 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1106                         {
1107                                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1108                                           nla_len(band), NULL);
1109
1110                                 nla_for_each_nested(freq,
1111                                         bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1112                                 {
1113                                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1114                                                 nla_data(freq), nla_len(freq), freq_policy);
1115
1116                                         ch_cmp = nl80211_freq2channel(
1117                                                 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1118
1119                                         if( (!ch_cur || (ch_cmp == ch_cur)) &&
1120                                             freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1121                                         {
1122                                                 dbm_max = (int)(0.01 * nla_get_u32(
1123                                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1124
1125                                                 break;
1126                                         }
1127                                 }
1128                         }
1129
1130                         nl80211_free(res);
1131                 }
1132                 nl80211_free(req);
1133         }
1134
1135         if( dbm_max > -1 )
1136         {
1137                 for( dbm_cur = 0, dbm_cnt = 0;
1138                      dbm_cur < dbm_max;
1139                      dbm_cur += 2, dbm_cnt++ )
1140                 {
1141                         entry.dbm = dbm_cur;
1142                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
1143
1144                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1145                 }
1146
1147                 entry.dbm = dbm_max;
1148                 entry.mw  = iwinfo_dbm2mw(dbm_max);
1149
1150                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1151                 dbm_cnt++;
1152
1153                 *len = dbm_cnt * sizeof(entry);
1154                 return 0;
1155         }
1156
1157         return -1;
1158 }
1159
1160 static void nl80211_get_scancrypto(const char *spec,
1161         struct iwinfo_crypto_entry *c)
1162 {
1163         if( strstr(spec, "OPEN") )
1164         {
1165                 c->enabled = 0;
1166         }
1167         else
1168         {
1169                 c->enabled = 1;
1170
1171                 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
1172                         c->wpa_version = 3;
1173
1174                 else if( strstr(spec, "WPA2") )
1175                         c->wpa_version = 2;
1176
1177                 else if( strstr(spec, "WPA") )
1178                         c->wpa_version = 1;
1179
1180                 else if( strstr(spec, "WEP") )
1181                         c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1182
1183
1184                 if( strstr(spec, "PSK") )
1185                         c->auth_suites |= IWINFO_KMGMT_PSK;
1186
1187                 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1188                         c->auth_suites |= IWINFO_KMGMT_8021x;
1189
1190                 if( strstr(spec, "WPA-NONE") )
1191                         c->auth_suites |= IWINFO_KMGMT_NONE;
1192
1193
1194                 if( strstr(spec, "TKIP") )
1195                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1196
1197                 if( strstr(spec, "CCMP") )
1198                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1199
1200                 if( strstr(spec, "WEP-40") )
1201                         c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1202
1203                 if( strstr(spec, "WEP-104") )
1204                         c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1205
1206                 c->group_ciphers = c->pair_ciphers;
1207         }
1208 }
1209
1210 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1211 {
1212         int freq, rssi, qmax, count;
1213         char *res;
1214         char ssid[128] = { 0 };
1215         char bssid[18] = { 0 };
1216         char cipher[256] = { 0 };
1217
1218         /* Got a radioX pseudo interface, find some interface on it or create one */
1219         if( !strncmp(ifname, "radio", 5) )
1220         {
1221                 /* Reuse existing interface */
1222                 if( (res = nl80211_phy2ifname(ifname)) != NULL )
1223                 {
1224                         return nl80211_get_scanlist(res, buf, len);
1225                 }
1226
1227                 /* Need to spawn a temporary iface for scanning */
1228                 else if( (res = nl80211_ifadd(ifname)) != NULL )
1229                 {
1230                         count = nl80211_get_scanlist(res, buf, len);
1231                         nl80211_ifdel(res);
1232                         return count;
1233                 }
1234         }
1235
1236         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1237
1238         /* WPA supplicant */
1239         if( (res = nl80211_wpasupp_info(ifname, "SCAN")) && !strcmp(res, "OK\n") )
1240         {
1241                 sleep(2);
1242
1243                 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1244                 {
1245                         nl80211_get_quality_max(ifname, &qmax);
1246
1247                         /* skip header line */
1248                         while( *res++ != '\n' );
1249
1250                         count = 0;
1251
1252                         while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1253                                       bssid, &freq, &rssi, cipher, ssid) > 0 )
1254                         {
1255                                 /* BSSID */
1256                                 e->mac[0] = strtol(&bssid[0],  NULL, 16);
1257                                 e->mac[1] = strtol(&bssid[3],  NULL, 16);
1258                                 e->mac[2] = strtol(&bssid[6],  NULL, 16);
1259                                 e->mac[3] = strtol(&bssid[9],  NULL, 16);
1260                                 e->mac[4] = strtol(&bssid[12], NULL, 16);
1261                                 e->mac[5] = strtol(&bssid[15], NULL, 16);
1262
1263                                 /* SSID */
1264                                 memcpy(e->ssid, ssid,
1265                                         min(strlen(ssid), sizeof(e->ssid) - 1));
1266
1267                                 /* Mode (assume master) */
1268                                 sprintf((char *)e->mode, "Master");
1269
1270                                 /* Channel */
1271                                 e->channel = nl80211_freq2channel(freq);
1272
1273                                 /* Signal */
1274                                 e->signal = rssi;
1275
1276                                 /* Quality */
1277                                 if( rssi < 0 )
1278                                 {
1279                                         /* The cfg80211 wext compat layer assumes a signal range
1280                                          * of -110 dBm to -40 dBm, the quality value is derived
1281                                          * by adding 110 to the signal level */
1282                                         if( rssi < -110 )
1283                                                 rssi = -110;
1284                                         else if( rssi > -40 )
1285                                                 rssi = -40;
1286
1287                                         e->quality = (rssi + 110);
1288                                 }
1289                                 else
1290                                 {
1291                                         e->quality = rssi;
1292                                 }
1293
1294                                 /* Max. Quality */
1295                                 e->quality_max = qmax;
1296
1297                                 /* Crypto */
1298                                 nl80211_get_scancrypto(cipher, &e->crypto);
1299
1300                                 /* advance to next line */
1301                                 while( *res && *res++ != '\n' );
1302
1303                                 count++;
1304                                 e++;
1305                         }
1306
1307                         *len = count * sizeof(struct iwinfo_scanlist_entry);
1308                         return 0;
1309                 }
1310         }
1311
1312         /* AP scan */
1313         else
1314         {
1315                 /* Got a temp interface, don't create yet another one */
1316                 if( !strncmp(ifname, "tmp.", 4) )
1317                 {
1318                         if( !iwinfo_ifup(ifname) )
1319                                 return -1;
1320
1321                         wext_get_scanlist(ifname, buf, len);
1322                         iwinfo_ifdown(ifname);
1323                         return 0;
1324                 }
1325
1326                 /* Spawn a new scan interface */
1327                 else
1328                 {
1329                         if( !(res = nl80211_ifadd(ifname)) )
1330                                 goto out;
1331
1332                         if( !iwinfo_ifmac(res) )
1333                                 goto out;
1334
1335                         /* if we can take the new interface up, the driver supports an
1336                          * additional interface and there's no need to tear down the ap */
1337                         if( iwinfo_ifup(res) )
1338                         {
1339                                 wext_get_scanlist(res, buf, len);
1340                                 iwinfo_ifdown(res);
1341                         }
1342
1343                         /* driver cannot create secondary interface, take down ap
1344                          * during scan */
1345                         else if( iwinfo_ifdown(ifname) && iwinfo_ifup(res) )
1346                         {
1347                                 wext_get_scanlist(res, buf, len);
1348                                 iwinfo_ifdown(res);
1349                                 iwinfo_ifup(ifname);
1350                                 nl80211_hostapd_hup(ifname);
1351                         }
1352
1353                 out:
1354                         nl80211_ifdel(res);
1355                         return 0;
1356                 }
1357         }
1358
1359         return -1;
1360 }
1361
1362 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1363 {
1364         int count = 0, bands_remain, freqs_remain;
1365         struct nl80211_msg_conveyor *req, *res;
1366         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1367         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1368         struct nlattr *band, *freq;
1369         struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1370
1371         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1372         if( req )
1373         {
1374                 res = nl80211_send(req);
1375                 if( res )
1376                 {
1377                         nla_for_each_nested(band,
1378                                 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1379                         {
1380                                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1381                                           nla_len(band), NULL);
1382
1383                                 nla_for_each_nested(freq,
1384                                         bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1385                                 {
1386                                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1387                                                 nla_data(freq), nla_len(freq), NULL);
1388
1389                                         if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1390                                             freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1391                                                 continue;
1392
1393                                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1394                                         e->channel = nl80211_freq2channel(e->mhz);
1395
1396                                         e->restricted = (
1397                                                 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1398                                                 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS]      ||
1399                                                 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1400                                         ) ? 1 : 0;
1401
1402                                         e++;
1403                                         count++;
1404                                 }
1405                         }
1406                         nl80211_free(res);
1407                 }
1408                 nl80211_free(req);
1409         }
1410
1411         if( count > 0 )
1412         {
1413                 *len = count * sizeof(struct iwinfo_freqlist_entry);
1414                 return 0;
1415         }
1416
1417         return -1;
1418 }
1419
1420 int nl80211_get_country(const char *ifname, char *buf)
1421 {
1422         int rv = -1;
1423         struct nl80211_msg_conveyor *req, *res;
1424
1425         req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1426         if( req )
1427         {
1428                 res = nl80211_send(req);
1429                 if( res )
1430                 {
1431                         if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1432                         {
1433                                 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1434                                 rv = 0;
1435                         }
1436                         nl80211_free(res);
1437                 }
1438                 nl80211_free(req);
1439         }
1440
1441         return rv;
1442 }
1443
1444 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1445 {
1446         int i, count;
1447         struct iwinfo_iso3166_label *l;
1448         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1449
1450         for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1451         {
1452                 e->iso3166 = l->iso3166;
1453                 e->ccode[0] = (l->iso3166 / 256);
1454                 e->ccode[1] = (l->iso3166 % 256);
1455         }
1456
1457         *len = (count * sizeof(struct iwinfo_country_entry));
1458         return 0;
1459 }
1460
1461 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1462 {
1463         int bands_remain, freqs_remain;
1464         struct nl80211_msg_conveyor *req, *res;
1465         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1466         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1467         struct nlattr *band, *freq;
1468         uint16_t caps = 0;
1469
1470         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1471         if( req )
1472         {
1473                 res = nl80211_send(req);
1474                 if( res )
1475                 {
1476                         nla_for_each_nested(band,
1477                                 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1478                         {
1479                                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1480                                           nla_len(band), NULL);
1481
1482                                 if( bands[NL80211_BAND_ATTR_HT_CAPA] )
1483                                         caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1484
1485                                 /* Treat any nonzero capability as 11n */
1486                                 if( caps > 0 )
1487                                         *buf |= IWINFO_80211_N;
1488
1489                                 nla_for_each_nested(freq,
1490                                         bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1491                                 {
1492                                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1493                                                 nla_data(freq), nla_len(freq), NULL);
1494
1495                                         if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] )
1496                                                 continue;
1497
1498                                         if( nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485 )
1499                                         {
1500                                                 *buf |= IWINFO_80211_B;
1501                                                 *buf |= IWINFO_80211_G;
1502                                         }
1503                                         else
1504                                         {
1505                                                 *buf |= IWINFO_80211_A;
1506                                         }
1507                                 }
1508                         }
1509                         nl80211_free(res);
1510                 }
1511                 nl80211_free(req);
1512         }
1513
1514         return *buf ? 0 : -1;
1515 }
1516
1517 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1518 {
1519         /* Test whether we can create another interface */
1520         char *nif = nl80211_ifadd(ifname);
1521
1522         if( nif )
1523         {
1524                 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
1525
1526                 iwinfo_ifdown(nif);
1527                 nl80211_ifdel(nif);
1528
1529                 return 0;
1530         }
1531
1532         return -1;
1533 }