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 static struct nl80211_state *nls = NULL;
  31
  32 static int nl80211_init(void)
  33 {
  34         int err, fd;
  35
  36         if (!nls)
  37         {
  38                 nls = malloc(sizeof(struct nl80211_state));
  39                 if (!nls) {
  40                         err = -ENOMEM;
  41                         goto err;
  42                 }
  43
  44                 nls->nl_sock = nl_socket_alloc();
  45                 if (!nls->nl_sock) {
  46                         err = -ENOMEM;
  47                         goto err;
  48                 }
  49
  50                 if( genl_connect(nls->nl_sock)) {
  51                         err = -ENOLINK;
  52                         goto err;
  53                 }
  54
  55                 fd = nl_socket_get_fd(nls->nl_sock);
  56                 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0)
  57                 {
  58                         err = -EINVAL;
  59                         goto err;
  60                 }
  61
  62                 if( genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
  63                         err = -ENOMEM;
  64                         goto err;
  65                 }
  66
  67                 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
  68                 if (!nls->nl80211)
  69                 {
  70                         err = -ENOENT;
  71                         goto err;
  72                 }
  73         }
  74
  75         return 0;
  76
  77
  78 err:
  79         nl80211_close();
  80         return err;
  81 }
  82
  83 static int nl80211_msg_error(struct sockaddr_nl *nla,
  84         struct nlmsgerr *err, void *arg)
  85 {
  86         int *ret = arg;
  87         *ret = err->error;
  88         return NL_STOP;
  89 }
  90
  91 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
  92 {
  93         int *ret = arg;
  94         *ret = 0;
  95         return NL_SKIP;
  96 }
  97
  98 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
  99 {
 100         int *ret = arg;
 101         *ret = 0;
 102         return NL_STOP;
 103 }
 104
 105 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
 106 {
 107         return NL_SKIP;
 108 }
 109
 110 static void nl80211_free(struct nl80211_msg_conveyor *cv)
 111 {
 112         if (cv)
 113         {
 114                 if (cv->cb)
 115                         nl_cb_put(cv->cb);
 116
 117                 if (cv->msg)
 118                         nlmsg_free(cv->msg);
 119
 120                 cv->cb  = NULL;
 121                 cv->msg = NULL;
 122         }
 123 }
 124
 125 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
 126 {
 127         static struct nl80211_msg_conveyor cv;
 128
 129         int ifidx = -1, phyidx = -1;
 130         struct nl_msg *req = NULL;
 131         struct nl_cb *cb = NULL;
 132
 133         if (nl80211_init() < 0)
 134                 goto err;
 135
 136         if (!strncmp(ifname, "phy", 3))
 137                 phyidx = atoi(&ifname[3]);
 138         else if (!strncmp(ifname, "radio", 5))
 139                 phyidx = atoi(&ifname[5]);
 140         else if (!strncmp(ifname, "mon.", 4))
 141                 ifidx = if_nametoindex(&ifname[4]);
 142         else
 143                 ifidx = if_nametoindex(ifname);
 144
 145         if ((ifidx < 0) && (phyidx < 0))
 146                 return NULL;
 147
 148         req = nlmsg_alloc();
 149         if (!req)
 150                 goto err;
 151
 152         cb = nl_cb_alloc(NL_CB_DEFAULT);
 153         if (!cb)
 154                 goto err;
 155
 156         genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
 157                 flags, cmd, 0);
 158
 159         if (ifidx > -1)
 160                 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
 161
 162         if (phyidx > -1)
 163                 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
 164
 165         cv.msg = req;
 166         cv.cb  = cb;
 167
 168         return &cv;
 169
 170 err:
 171 nla_put_failure:
 172         if (cb)
 173                 nl_cb_put(cb);
 174
 175         if (req)
 176                 nlmsg_free(req);
 177
 178         return NULL;
 179 }
 180
 181 static struct nl80211_msg_conveyor * nl80211_send(
 182         struct nl80211_msg_conveyor *cv,
 183         int (*cb_func)(struct nl_msg *, void *), void *cb_arg
 184 ) {
 185         static struct nl80211_msg_conveyor rcv;
 186         int err = 1;
 187
 188         if (cb_func)
 189                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
 190         else
 191                 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
 192
 193         if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
 194                 goto err;
 195
 196         nl_cb_err(cv->cb,               NL_CB_CUSTOM, nl80211_msg_error,  &err);
 197         nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
 198         nl_cb_set(cv->cb, NL_CB_ACK,    NL_CB_CUSTOM, nl80211_msg_ack,    &err);
 199
 200         while (err > 0)
 201                 nl_recvmsgs(nls->nl_sock, cv->cb);
 202
 203         return &rcv;
 204
 205 err:
 206         nl_cb_put(cv->cb);
 207         nlmsg_free(cv->msg);
 208
 209         return NULL;
 210 }
 211
 212 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
 213 {
 214         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 215         static struct nlattr *attr[NL80211_ATTR_MAX + 1];
 216
 217         nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 218                 genlmsg_attrlen(gnlh, 0), NULL);
 219
 220         return attr;
 221 }
 222
 223 static int nl80211_freq2channel(int freq)
 224 {
 225     if (freq == 2484)
 226         return 14;
 227
 228     if (freq < 2484)
 229         return (freq - 2407) / 5;
 230
 231     return (freq / 5) - 1000;
 232 }
 233
 234 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
 235 {
 236         int i, len;
 237         char lkey[64] = { 0 };
 238         const char *ln = buf;
 239         static char lval[256] = { 0 };
 240
 241         int matched_if = ifname ? 0 : 1;
 242
 243
 244         for( i = 0, len = strlen(buf); i < len; i++ )
 245         {
 246                 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
 247                 {
 248                         ln++;
 249                 }
 250                 else if (!lkey[0] && (buf[i] == '='))
 251                 {
 252                         if ((&buf[i] - ln) > 0)
 253                                 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
 254                 }
 255                 else if (buf[i] == '\n')
 256                 {
 257                         if (lkey[0])
 258                         {
 259                                 memcpy(lval, ln + strlen(lkey) + 1,
 260                                         min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
 261
 262                                 if ((ifname != NULL) &&
 263                                     (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
 264                                 {
 265                                         matched_if = !strcmp(lval, ifname);
 266                                 }
 267                                 else if (matched_if && !strcmp(lkey, key))
 268                                 {
 269                                         return lval;
 270                                 }
 271                         }
 272
 273                         ln = &buf[i+1];
 274                         memset(lkey, 0, sizeof(lkey));
 275                         memset(lval, 0, sizeof(lval));
 276                 }
 277         }
 278
 279         return NULL;
 280 }
 281
 282 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
 283 {
 284         char *buf = arg;
 285         struct nlattr **attr = nl80211_parse(msg);
 286
 287         if (attr[NL80211_ATTR_WIPHY_NAME])
 288                 sprintf(buf, "%s", nla_data(attr[NL80211_ATTR_WIPHY_NAME]));
 289         else
 290                 buf[0] = 0;
 291
 292         return NL_SKIP;
 293 }
 294
 295 static char * nl80211_ifname2phy(const char *ifname)
 296 {
 297         static char phy[32] = { 0 };
 298         struct nl80211_msg_conveyor *req;
 299
 300         memset(phy, 0, sizeof(phy));
 301
 302         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
 303         if (req)
 304         {
 305                 nl80211_send(req, nl80211_ifname2phy_cb, phy);
 306                 nl80211_free(req);
 307         }
 308
 309         return phy[0] ? phy : NULL;
 310 }
 311
 312 static char * nl80211_hostapd_info(const char *ifname)
 313 {
 314         char *phy;
 315         char path[32] = { 0 };
 316         static char buf[4096] = { 0 };
 317         FILE *conf;
 318
 319         if ((phy = nl80211_ifname2phy(ifname)) != NULL)
 320         {
 321                 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
 322
 323                 if ((conf = fopen(path, "r")) != NULL)
 324                 {
 325                         fread(buf, sizeof(buf) - 1, 1, conf);
 326                         fclose(conf);
 327
 328                         return buf;
 329                 }
 330         }
 331
 332         return NULL;
 333 }
 334
 335 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
 336 {
 337         fd_set rfds;
 338         struct timeval tv = { 2, 0 };
 339
 340         FD_ZERO(&rfds);
 341         FD_SET(sock, &rfds);
 342
 343         memset(buf, 0, blen);
 344
 345
 346         if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
 347                 return -1;
 348
 349         if (!FD_ISSET(sock, &rfds))
 350                 return -1;
 351
 352         return recv(sock, buf, blen, 0);
 353 }
 354
 355 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
 356                                                                    const char *event)
 357 {
 358         int numtry = 0;
 359         int sock = -1;
 360         char *rv = NULL;
 361         size_t remote_length, local_length;
 362         static char buffer[10240] = { 0 };
 363
 364         struct sockaddr_un local = { 0 };
 365         struct sockaddr_un remote = { 0 };
 366
 367
 368         sock = socket(PF_UNIX, SOCK_DGRAM, 0);
 369         if (sock < 0)
 370                 return NULL;
 371
 372         remote.sun_family = AF_UNIX;
 373         remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
 374                 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
 375
 376         if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
 377                 goto out;
 378
 379         if (connect(sock, (struct sockaddr *) &remote, remote_length))
 380                 goto out;
 381
 382         local.sun_family = AF_UNIX;
 383         local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
 384                 "/var/run/iwinfo-%s-%d", ifname, getpid());
 385
 386         if (bind(sock, (struct sockaddr *) &local, local_length))
 387                 goto out;
 388
 389
 390         send(sock, "ATTACH", 6, 0);
 391
 392         if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
 393                 goto out;
 394
 395
 396         send(sock, cmd, strlen(cmd), 0);
 397
 398         while( numtry++ < 5 )
 399         {
 400                 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
 401                 {
 402                         if (event)
 403                                 continue;
 404
 405                         break;
 406                 }
 407
 408                 if ((!event && buffer[0] != '<') || strstr(buffer, event))
 409                         break;
 410         }
 411
 412         rv = buffer;
 413
 414 out:
 415         close(sock);
 416
 417         if (local.sun_family)
 418                 unlink(local.sun_path);
 419
 420         return rv;
 421 }
 422
 423 static inline int nl80211_readint(const char *path)
 424 {
 425         int fd;
 426         int rv = -1;
 427         char buffer[16];
 428
 429         if ((fd = open(path, O_RDONLY)) > -1)
 430         {
 431                 if (read(fd, buffer, sizeof(buffer)) > 0)
 432                         rv = atoi(buffer);
 433
 434                 close(fd);
 435         }
 436
 437         return rv;
 438 }
 439
 440 static char * nl80211_phy2ifname(const char *ifname)
 441 {
 442         int fd, ifidx = -1, cifidx = -1, phyidx = -1;
 443         char buffer[64];
 444         static char nif[IFNAMSIZ] = { 0 };
 445
 446         DIR *d;
 447         struct dirent *e;
 448
 449         if (!ifname)
 450                 return NULL;
 451         else if (!strncmp(ifname, "phy", 3))
 452                 phyidx = atoi(&ifname[3]);
 453         else if (!strncmp(ifname, "radio", 5))
 454                 phyidx = atoi(&ifname[5]);
 455
 456         memset(nif, 0, sizeof(nif));
 457
 458         if (phyidx > -1)
 459         {
 460                 if ((d = opendir("/sys/class/net")) != NULL)
 461                 {
 462                         while( (e = readdir(d)) != NULL )
 463                         {
 464                                 snprintf(buffer, sizeof(buffer),
 465                                         "/sys/class/net/%s/phy80211/index", e->d_name);
 466
 467                                 if (nl80211_readint(buffer) == phyidx)
 468                                 {
 469                                         snprintf(buffer, sizeof(buffer),
 470                                                 "/sys/class/net/%s/ifindex", e->d_name);
 471
 472                                         if( (cifidx = nl80211_readint(buffer)) >= 0 &&
 473                                             ((ifidx < 0) || (cifidx < ifidx)) )
 474                                         {
 475                                                 ifidx = cifidx;
 476                                                 strncpy(nif, e->d_name, sizeof(nif));
 477                                         }
 478                                 }
 479                         }
 480
 481                         closedir(d);
 482                 }
 483         }
 484
 485         return nif[0] ? nif : NULL;
 486 }
 487
 488 static char * nl80211_ifadd(const char *ifname)
 489 {
 490         int phyidx;
 491         char *rv = NULL;
 492         static char nif[IFNAMSIZ] = { 0 };
 493         struct nl80211_msg_conveyor *req, *res;
 494
 495         req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
 496         if (req)
 497         {
 498                 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
 499
 500                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
 501                 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
 502
 503                 nl80211_send(req, NULL, NULL);
 504
 505                 rv = nif;
 506
 507         nla_put_failure:
 508                 nl80211_free(req);
 509         }
 510
 511         return rv;
 512 }
 513
 514 static void nl80211_ifdel(const char *ifname)
 515 {
 516         struct nl80211_msg_conveyor *req;
 517
 518         req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
 519         if (req)
 520         {
 521                 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
 522
 523                 nl80211_send(req, NULL, NULL);
 524
 525         nla_put_failure:
 526                 nl80211_free(req);
 527         }
 528 }
 529
 530 static void nl80211_hostapd_hup(const char *ifname)
 531 {
 532         int fd, pid = 0;
 533         char buf[32];
 534         char *phy = nl80211_ifname2phy(ifname);
 535
 536         if (phy)
 537         {
 538                 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
 539                 if ((fd = open(buf, O_RDONLY)) > 0)
 540                 {
 541                         if (read(fd, buf, sizeof(buf)) > 0)
 542                                 pid = atoi(buf);
 543
 544                         close(fd);
 545                 }
 546
 547                 if (pid > 0)
 548                         kill(pid, 1);
 549         }
 550 }
 551
 552
 553 int nl80211_probe(const char *ifname)
 554 {
 555         return !!nl80211_ifname2phy(ifname);
 556 }
 557
 558 void nl80211_close(void)
 559 {
 560         if (nls)
 561         {
 562                 if (nls->nl_sock)
 563                         nl_socket_free(nls->nl_sock);
 564
 565                 if (nls->nl_cache)
 566                         nl_cache_free(nls->nl_cache);
 567
 568                 free(nls);
 569                 nls = NULL;
 570         }
 571 }
 572
 573 int nl80211_get_mode(const char *ifname, char *buf)
 574 {
 575         return wext_get_mode(ifname, buf);
 576 }
 577
 578 int nl80211_get_ssid(const char *ifname, char *buf)
 579 {
 580         char *ssid;
 581
 582         if (!wext_get_ssid(ifname, buf))
 583         {
 584                 return 0;
 585         }
 586         else if( (ssid = nl80211_hostapd_info(ifname)) &&
 587                  (ssid = nl80211_getval(ifname, ssid, "ssid")) )
 588         {
 589                 memcpy(buf, ssid, strlen(ssid));
 590                 return 0;
 591         }
 592
 593         return -1;
 594 }
 595
 596 int nl80211_get_bssid(const char *ifname, char *buf)
 597 {
 598         char *bssid;
 599         unsigned char mac[6];
 600
 601         if (!wext_get_bssid(ifname, buf))
 602         {
 603                 return 0;
 604         }
 605         else if((bssid = nl80211_hostapd_info(ifname)) &&
 606                  (bssid = nl80211_getval(ifname, bssid, "bssid")))
 607         {
 608                 mac[0] = strtol(&bssid[0],  NULL, 16);
 609                 mac[1] = strtol(&bssid[3],  NULL, 16);
 610                 mac[2] = strtol(&bssid[6],  NULL, 16);
 611                 mac[3] = strtol(&bssid[9],  NULL, 16);
 612                 mac[4] = strtol(&bssid[12], NULL, 16);
 613                 mac[5] = strtol(&bssid[15], NULL, 16);
 614
 615                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
 616                         mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 617
 618                 return 0;
 619         }
 620
 621         return -1;
 622 }
 623
 624 int nl80211_get_channel(const char *ifname, int *buf)
 625 {
 626         char *first;
 627
 628         if (!wext_get_channel(ifname, buf))
 629                 return 0;
 630
 631         else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
 632                 return wext_get_channel(first, buf);
 633
 634         return -1;
 635 }
 636
 637 int nl80211_get_frequency(const char *ifname, int *buf)
 638 {
 639         char *first;
 640
 641         if (!wext_get_frequency(ifname, buf))
 642                 return 0;
 643
 644         else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
 645                 return wext_get_frequency(first, buf);
 646
 647         return -1;
 648 }
 649
 650 int nl80211_get_txpower(const char *ifname, int *buf)
 651 {
 652         return wext_get_txpower(ifname, buf);
 653 }
 654
 655
 656 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
 657 {
 658         int8_t dbm;
 659         int16_t mbit;
 660         struct nl80211_rssi_rate *rr = arg;
 661         struct nlattr **attr = nl80211_parse(msg);
 662         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
 663         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
 664
 665         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 666                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
 667                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
 668                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
 669                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
 670                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
 671                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
 672                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
 673                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
 674                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
 675                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
 676         };
 677
 678         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
 679                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
 680                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
 681                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
 682                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
 683         };
 684
 685         if (attr[NL80211_ATTR_STA_INFO])
 686         {
 687                 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
 688                                 attr[NL80211_ATTR_STA_INFO], stats_policy) )
 689                 {
 690                         if (sinfo[NL80211_STA_INFO_SIGNAL])
 691                         {
 692                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
 693                                 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
 694                         }
 695
 696                         if (sinfo[NL80211_STA_INFO_TX_BITRATE])
 697                         {
 698                                 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
 699                                                 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
 700                                 {
 701                                         if (rinfo[NL80211_RATE_INFO_BITRATE])
 702                                         {
 703                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
 704                                                 rr->rate = rr->rate
 705                                                         ? (int16_t)((rr->rate + mbit) / 2) : mbit;
 706                                         }
 707                                 }
 708                         }
 709                 }
 710         }
 711
 712         return NL_SKIP;
 713 }
 714
 715 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
 716 {
 717         DIR *d;
 718         struct dirent *de;
 719         struct nl80211_msg_conveyor *req;
 720
 721         r->rssi = 0;
 722         r->rate = 0;
 723
 724         if ((d = opendir("/sys/class/net")) != NULL)
 725         {
 726                 while ((de = readdir(d)) != NULL)
 727                 {
 728                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
 729                                 (!de->d_name[strlen(ifname)] ||
 730                                  !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
 731                         {
 732                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
 733                                                                   NLM_F_DUMP);
 734
 735                                 if (req)
 736                                 {
 737                                         nl80211_send(req, nl80211_fill_signal_cb, r);
 738                                         nl80211_free(req);
 739                                 }
 740                         }
 741                 }
 742
 743                 closedir(d);
 744         }
 745 }
 746
 747 int nl80211_get_bitrate(const char *ifname, int *buf)
 748 {
 749         struct nl80211_rssi_rate rr;
 750
 751         if (!wext_get_bitrate(ifname, buf))
 752                 return 0;
 753
 754         nl80211_fill_signal(ifname, &rr);
 755
 756         if (rr.rate)
 757         {
 758                 *buf = (rr.rate * 100);
 759                 return 0;
 760         }
 761
 762         return -1;
 763 }
 764
 765 int nl80211_get_signal(const char *ifname, int *buf)
 766 {
 767         struct nl80211_rssi_rate rr;
 768
 769         if (!wext_get_signal(ifname, buf))
 770                 return 0;
 771
 772         nl80211_fill_signal(ifname, &rr);
 773
 774         if (rr.rssi)
 775         {
 776                 *buf = rr.rssi;
 777                 return 0;
 778         }
 779
 780         return -1;
 781 }
 782
 783 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
 784 {
 785         int8_t *noise = arg;
 786         struct nlattr **tb = nl80211_parse(msg);
 787         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
 788
 789         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
 790                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
 791                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
 792         };
 793
 794         if (!tb[NL80211_ATTR_SURVEY_INFO])
 795                 return NL_SKIP;
 796
 797         if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
 798                                                  tb[NL80211_ATTR_SURVEY_INFO], sp))
 799                 return NL_SKIP;
 800
 801         if (!si[NL80211_SURVEY_INFO_NOISE])
 802                 return NL_SKIP;
 803
 804         if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
 805                 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
 806
 807         return NL_SKIP;
 808 }
 809
 810
 811 int nl80211_get_noise(const char *ifname, int *buf)
 812 {
 813         int8_t noise;
 814         struct nl80211_msg_conveyor *req;
 815
 816         req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
 817         if (req)
 818         {
 819                 noise = 0;
 820
 821                 nl80211_send(req, nl80211_get_noise_cb, &noise);
 822                 nl80211_free(req);
 823
 824                 if (noise)
 825                 {
 826                         *buf = noise;
 827                         return 0;
 828                 }
 829         }
 830
 831         return -1;
 832 }
 833
 834 int nl80211_get_quality(const char *ifname, int *buf)
 835 {
 836         int signal;
 837
 838         if (wext_get_quality(ifname, buf))
 839         {
 840                 *buf = 0;
 841
 842                 if (!nl80211_get_signal(ifname, &signal))
 843                 {
 844                         /* A positive signal level is usually just a quality
 845                          * value, pass through as-is */
 846                         if (signal >= 0)
 847                         {
 848                                 *buf = signal;
 849                         }
 850
 851                         /* The cfg80211 wext compat layer assumes a signal range
 852                          * of -110 dBm to -40 dBm, the quality value is derived
 853                          * by adding 110 to the signal level */
 854                         else
 855                         {
 856                                 if (signal < -110)
 857                                         signal = -110;
 858                                 else if (signal > -40)
 859                                         signal = -40;
 860
 861                                 *buf = (signal + 110);
 862                         }
 863                 }
 864         }
 865
 866         return 0;
 867 }
 868
 869 int nl80211_get_quality_max(const char *ifname, int *buf)
 870 {
 871         if (wext_get_quality_max(ifname, buf))
 872                 /* The cfg80211 wext compat layer assumes a maximum
 873                  * quality of 70 */
 874                 *buf = 70;
 875
 876         return 0;
 877 }
 878
 879 int nl80211_get_encryption(const char *ifname, char *buf)
 880 {
 881         int i;
 882         char k[9];
 883         char *val, *res;
 884         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
 885
 886         /* WPA supplicant */
 887         if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
 888             (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
 889         {
 890                 /* WEP */
 891                 if (strstr(val, "WEP"))
 892                 {
 893                         if (strstr(val, "WEP-40"))
 894                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
 895
 896                         else if (strstr(val, "WEP-104"))
 897                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
 898
 899                         c->enabled       = 1;
 900                         c->group_ciphers = c->pair_ciphers;
 901
 902                         c->auth_suites |= IWINFO_KMGMT_NONE;
 903                         c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
 904                 }
 905
 906                 /* WPA */
 907                 else
 908                 {
 909                         if (strstr(val, "TKIP"))
 910                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
 911
 912                         else if (strstr(val, "CCMP"))
 913                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
 914
 915                         else if (strstr(val, "NONE"))
 916                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
 917
 918                         else if (strstr(val, "WEP-40"))
 919                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
 920
 921                         else if (strstr(val, "WEP-104"))
 922                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
 923
 924
 925                         if ((val = nl80211_getval(NULL, res, "group_cipher")))
 926                         {
 927                                 if (strstr(val, "TKIP"))
 928                                         c->group_ciphers |= IWINFO_CIPHER_TKIP;
 929
 930                                 else if (strstr(val, "CCMP"))
 931                                         c->group_ciphers |= IWINFO_CIPHER_CCMP;
 932
 933                                 else if (strstr(val, "NONE"))
 934                                         c->group_ciphers |= IWINFO_CIPHER_NONE;
 935
 936                                 else if (strstr(val, "WEP-40"))
 937                                         c->group_ciphers |= IWINFO_CIPHER_WEP40;
 938
 939                                 else if (strstr(val, "WEP-104"))
 940                                         c->group_ciphers |= IWINFO_CIPHER_WEP104;
 941                         }
 942
 943
 944                         if ((val = nl80211_getval(NULL, res, "key_mgmt")))
 945                         {
 946                                 if (strstr(val, "WPA2"))
 947                                         c->wpa_version = 2;
 948
 949                                 else if (strstr(val, "WPA"))
 950                                         c->wpa_version = 1;
 951
 952
 953                                 if (strstr(val, "PSK"))
 954                                         c->auth_suites |= IWINFO_KMGMT_PSK;
 955
 956                                 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
 957                                         c->auth_suites |= IWINFO_KMGMT_8021x;
 958
 959                                 else if (strstr(val, "NONE"))
 960                                         c->auth_suites |= IWINFO_KMGMT_NONE;
 961                         }
 962
 963                         c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
 964                 }
 965
 966                 return 0;
 967         }
 968
 969         /* Hostapd */
 970         else if ((res = nl80211_hostapd_info(ifname)))
 971         {
 972                 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
 973                         c->wpa_version = atoi(val);
 974
 975                 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
 976
 977                 if (!val || strstr(val, "PSK"))
 978                         c->auth_suites |= IWINFO_KMGMT_PSK;
 979
 980                 if (val && strstr(val, "EAP"))
 981                         c->auth_suites |= IWINFO_KMGMT_8021x;
 982
 983                 if (val && strstr(val, "NONE"))
 984                         c->auth_suites |= IWINFO_KMGMT_NONE;
 985
 986                 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
 987                 {
 988                         if (strstr(val, "TKIP"))
 989                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
 990
 991                         if (strstr(val, "CCMP"))
 992                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
 993
 994                         if (strstr(val, "NONE"))
 995                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
 996                 }
 997
 998                 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
 999                 {
1000                         switch(atoi(val)) {
1001                                 case 1:
1002                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1003                                         break;
1004
1005                                 case 2:
1006                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1007                                         break;
1008
1009                                 case 3:
1010                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1011                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1012                                         break;
1013
1014                                 default:
1015                                         break;
1016                         }
1017
1018                         for( i = 0; i < 4; i++ )
1019                         {
1020                                 snprintf(k, sizeof(k), "wep_key%d", i);
1021
1022                                 if ((val = nl80211_getval(ifname, res, k)))
1023                                 {
1024                                         if ((strlen(val) == 5) || (strlen(val) == 10))
1025                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1026
1027                                         else if ((strlen(val) == 13) || (strlen(val) == 26))
1028                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1029                                 }
1030                         }
1031                 }
1032
1033                 c->group_ciphers = c->pair_ciphers;
1034                 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1035
1036                 return 0;
1037         }
1038
1039         return -1;
1040 }
1041
1042
1043 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1044 {
1045         struct nl80211_array_buf *arr = arg;
1046         struct iwinfo_assoclist_entry *e = arr->buf;
1047         struct nlattr **attr = nl80211_parse(msg);
1048         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1049
1050         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1051                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1052                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1053                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1054                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1055                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1056                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1057                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1058                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1059                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1060                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1061         };
1062
1063         /* advance to end of array */
1064         e += arr->count;
1065
1066         if (attr[NL80211_ATTR_MAC])
1067                 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1068
1069         if (attr[NL80211_ATTR_STA_INFO])
1070         {
1071                 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1072                                 attr[NL80211_ATTR_STA_INFO], stats_policy))
1073                 {
1074                         if (sinfo[NL80211_STA_INFO_SIGNAL])
1075                                 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1076                 }
1077         }
1078
1079         e->noise = 0; /* filled in by caller */
1080         arr->count++;
1081
1082         return NL_SKIP;
1083 }
1084
1085 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1086 {
1087         DIR *d;
1088         int i, noise = 0;
1089         struct dirent *de;
1090         struct nl80211_msg_conveyor *req;
1091         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1092         struct iwinfo_assoclist_entry *e;
1093
1094         if ((d = opendir("/sys/class/net")) != NULL)
1095         {
1096                 while ((de = readdir(d)) != NULL)
1097                 {
1098                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1099                                 (!de->d_name[strlen(ifname)] ||
1100                                  !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1101                         {
1102                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1103                                                                   NLM_F_DUMP);
1104
1105                                 if (req)
1106                                 {
1107                                         nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1108                                         nl80211_free(req);
1109                                 }
1110
1111                                 break;
1112                         }
1113                 }
1114
1115                 closedir(d);
1116
1117                 if (!nl80211_get_noise(ifname, &noise))
1118                         for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1119                                 e->noise = noise;
1120
1121                 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1122                 return 0;
1123         }
1124
1125         return -1;
1126 }
1127
1128 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1129 {
1130         int *dbm_max = arg;
1131         int ch_cur, ch_cmp, bands_remain, freqs_remain;
1132
1133         struct nlattr **attr = nl80211_parse(msg);
1134         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1135         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1136         struct nlattr *band, *freq;
1137
1138         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1139                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1140                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1141                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1142                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1143                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1144                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1145         };
1146
1147         ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1148         *dbm_max = -1;
1149
1150         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1151         {
1152                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1153                           nla_len(band), NULL);
1154
1155                 nla_for_each_nested(freq,
1156                         bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1157                 {
1158                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1159                                 nla_data(freq), nla_len(freq), freq_policy);
1160
1161                         ch_cmp = nl80211_freq2channel(
1162                                 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1163
1164                         if( (!ch_cur || (ch_cmp == ch_cur)) &&
1165                                 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1166                         {
1167                                 *dbm_max = (int)(0.01 * nla_get_u32(
1168                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1169
1170                                 break;
1171                         }
1172                 }
1173         }
1174
1175         return NL_SKIP;
1176 }
1177
1178 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1179 {
1180         int ch_cur;
1181         int dbm_max = -1, dbm_cur, dbm_cnt;
1182         struct nl80211_msg_conveyor *req;
1183         struct iwinfo_txpwrlist_entry entry;
1184
1185         if (nl80211_get_channel(ifname, &ch_cur))
1186                 ch_cur = 0;
1187
1188         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1189         if (req)
1190         {
1191                 /* initialize the value pointer with channel for callback */
1192                 dbm_max = ch_cur;
1193
1194                 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1195                 nl80211_free(req);
1196         }
1197
1198         if (dbm_max > -1)
1199         {
1200                 for (dbm_cur = 0, dbm_cnt = 0;
1201                      dbm_cur < dbm_max;
1202                      dbm_cur++, dbm_cnt++)
1203                 {
1204                         entry.dbm = dbm_cur;
1205                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
1206
1207                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1208                 }
1209
1210                 entry.dbm = dbm_max;
1211                 entry.mw  = iwinfo_dbm2mw(dbm_max);
1212
1213                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1214                 dbm_cnt++;
1215
1216                 *len = dbm_cnt * sizeof(entry);
1217                 return 0;
1218         }
1219
1220         return -1;
1221 }
1222
1223 static void nl80211_get_scancrypto(const char *spec,
1224         struct iwinfo_crypto_entry *c)
1225 {
1226         if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1227         {
1228                 c->enabled = 1;
1229
1230                 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1231                         c->wpa_version = 3;
1232
1233                 else if (strstr(spec, "WPA2"))
1234                         c->wpa_version = 2;
1235
1236                 else if (strstr(spec, "WPA"))
1237                         c->wpa_version = 1;
1238
1239                 else if (strstr(spec, "WEP"))
1240                         c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1241
1242
1243                 if (strstr(spec, "PSK"))
1244                         c->auth_suites |= IWINFO_KMGMT_PSK;
1245
1246                 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1247                         c->auth_suites |= IWINFO_KMGMT_8021x;
1248
1249                 if (strstr(spec, "WPA-NONE"))
1250                         c->auth_suites |= IWINFO_KMGMT_NONE;
1251
1252
1253                 if (strstr(spec, "TKIP"))
1254                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1255
1256                 if (strstr(spec, "CCMP"))
1257                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1258
1259                 if (strstr(spec, "WEP-40"))
1260                         c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1261
1262                 if (strstr(spec, "WEP-104"))
1263                         c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1264
1265                 c->group_ciphers = c->pair_ciphers;
1266         }
1267         else
1268         {
1269                 c->enabled = 0;
1270         }
1271 }
1272
1273 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1274 {
1275         int freq, rssi, qmax, count;
1276         char *res;
1277         char ssid[128] = { 0 };
1278         char bssid[18] = { 0 };
1279         char cipher[256] = { 0 };
1280
1281         /* Got a radioX pseudo interface, find some interface on it or create one */
1282         if (!strncmp(ifname, "radio", 5))
1283         {
1284                 /* Reuse existing interface */
1285                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1286                 {
1287                         return nl80211_get_scanlist(res, buf, len);
1288                 }
1289
1290                 /* Need to spawn a temporary iface for scanning */
1291                 else if ((res = nl80211_ifadd(ifname)) != NULL)
1292                 {
1293                         count = nl80211_get_scanlist(res, buf, len);
1294                         nl80211_ifdel(res);
1295                         return count;
1296                 }
1297         }
1298
1299         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1300
1301         /* WPA supplicant */
1302         if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1303         {
1304                 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1305                 {
1306                         nl80211_get_quality_max(ifname, &qmax);
1307
1308                         /* skip header line */
1309                         while( *res++ != '\n' );
1310
1311                         count = 0;
1312
1313                         while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1314                                       bssid, &freq, &rssi, cipher, ssid) > 0 )
1315                         {
1316                                 /* BSSID */
1317                                 e->mac[0] = strtol(&bssid[0],  NULL, 16);
1318                                 e->mac[1] = strtol(&bssid[3],  NULL, 16);
1319                                 e->mac[2] = strtol(&bssid[6],  NULL, 16);
1320                                 e->mac[3] = strtol(&bssid[9],  NULL, 16);
1321                                 e->mac[4] = strtol(&bssid[12], NULL, 16);
1322                                 e->mac[5] = strtol(&bssid[15], NULL, 16);
1323
1324                                 /* SSID */
1325                                 memcpy(e->ssid, ssid,
1326                                         min(strlen(ssid), sizeof(e->ssid) - 1));
1327
1328                                 /* Mode (assume master) */
1329                                 sprintf((char *)e->mode, "Master");
1330
1331                                 /* Channel */
1332                                 e->channel = nl80211_freq2channel(freq);
1333
1334                                 /* Signal */
1335                                 e->signal = rssi;
1336
1337                                 /* Quality */
1338                                 if (rssi < 0)
1339                                 {
1340                                         /* The cfg80211 wext compat layer assumes a signal range
1341                                          * of -110 dBm to -40 dBm, the quality value is derived
1342                                          * by adding 110 to the signal level */
1343                                         if (rssi < -110)
1344                                                 rssi = -110;
1345                                         else if (rssi > -40)
1346                                                 rssi = -40;
1347
1348                                         e->quality = (rssi + 110);
1349                                 }
1350                                 else
1351                                 {
1352                                         e->quality = rssi;
1353                                 }
1354
1355                                 /* Max. Quality */
1356                                 e->quality_max = qmax;
1357
1358                                 /* Crypto */
1359                                 nl80211_get_scancrypto(cipher, &e->crypto);
1360
1361                                 /* advance to next line */
1362                                 while( *res && *res++ != '\n' );
1363
1364                                 count++;
1365                                 e++;
1366
1367                                 memset(ssid, 0, sizeof(ssid));
1368                                 memset(bssid, 0, sizeof(bssid));
1369                                 memset(cipher, 0, sizeof(cipher));
1370                         }
1371
1372                         *len = count * sizeof(struct iwinfo_scanlist_entry);
1373                         return 0;
1374                 }
1375         }
1376
1377         /* AP scan */
1378         else
1379         {
1380                 /* Got a temp interface, don't create yet another one */
1381                 if (!strncmp(ifname, "tmp.", 4))
1382                 {
1383                         if (!iwinfo_ifup(ifname))
1384                                 return -1;
1385
1386                         wext_get_scanlist(ifname, buf, len);
1387                         iwinfo_ifdown(ifname);
1388                         return 0;
1389                 }
1390
1391                 /* Spawn a new scan interface */
1392                 else
1393                 {
1394                         if (!(res = nl80211_ifadd(ifname)))
1395                                 goto out;
1396
1397                         if (!iwinfo_ifmac(res))
1398                                 goto out;
1399
1400                         /* if we can take the new interface up, the driver supports an
1401                          * additional interface and there's no need to tear down the ap */
1402                         if (iwinfo_ifup(res))
1403                         {
1404                                 wext_get_scanlist(res, buf, len);
1405                                 iwinfo_ifdown(res);
1406                         }
1407
1408                         /* driver cannot create secondary interface, take down ap
1409                          * during scan */
1410                         else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1411                         {
1412                                 wext_get_scanlist(res, buf, len);
1413                                 iwinfo_ifdown(res);
1414                                 iwinfo_ifup(ifname);
1415                                 nl80211_hostapd_hup(ifname);
1416                         }
1417
1418                 out:
1419                         nl80211_ifdel(res);
1420                         return 0;
1421                 }
1422         }
1423
1424         return -1;
1425 }
1426
1427 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1428 {
1429         int bands_remain, freqs_remain;
1430
1431         struct nl80211_array_buf *arr = arg;
1432         struct iwinfo_freqlist_entry *e = arr->buf;
1433
1434         struct nlattr **attr = nl80211_parse(msg);
1435         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1436         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1437         struct nlattr *band, *freq;
1438
1439         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1440                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1441                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1442                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1443                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1444                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1445                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1446         };
1447
1448         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1449         {
1450                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1451                         nla_len(band), NULL);
1452
1453                 nla_for_each_nested(freq,
1454                         bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1455                 {
1456                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1457                                 nla_data(freq), nla_len(freq), NULL);
1458
1459                         if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1460                                 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1461                                 continue;
1462
1463                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1464                         e->channel = nl80211_freq2channel(e->mhz);
1465
1466                         e->restricted = (
1467                                 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1468                                 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS]      ||
1469                                 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1470                         ) ? 1 : 0;
1471
1472                         e++;
1473                         arr->count++;
1474                 }
1475         }
1476
1477         return NL_SKIP;
1478 }
1479
1480 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1481 {
1482         struct nl80211_msg_conveyor *req;
1483         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1484
1485         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1486         if (req)
1487         {
1488                 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
1489                 nl80211_free(req);
1490         }
1491
1492         if (arr.count > 0)
1493         {
1494                 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
1495                 return 0;
1496         }
1497
1498         return -1;
1499 }
1500
1501 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
1502 {
1503         char *buf = arg;
1504         struct nlattr **attr = nl80211_parse(msg);
1505
1506         if (attr[NL80211_ATTR_REG_ALPHA2])
1507                 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
1508         else
1509                 buf[0] = 0;
1510
1511         return NL_SKIP;
1512 }
1513
1514 int nl80211_get_country(const char *ifname, char *buf)
1515 {
1516         int rv = -1;
1517         struct nl80211_msg_conveyor *req;
1518
1519         req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1520         if (req)
1521         {
1522                 nl80211_send(req, nl80211_get_country_cb, buf);
1523                 nl80211_free(req);
1524
1525                 if (buf[0])
1526                         rv = 0;
1527         }
1528
1529         return rv;
1530 }
1531
1532 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1533 {
1534         int i, count;
1535         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1536         const struct iwinfo_iso3166_label *l;
1537
1538         for( l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++ )
1539         {
1540                 e->iso3166 = l->iso3166;
1541                 e->ccode[0] = (l->iso3166 / 256);
1542                 e->ccode[1] = (l->iso3166 % 256);
1543         }
1544
1545         *len = (count * sizeof(struct iwinfo_country_entry));
1546         return 0;
1547 }
1548
1549 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
1550 {
1551         int *modes = arg;
1552         int bands_remain, freqs_remain;
1553         uint16_t caps = 0;
1554         struct nlattr **attr = nl80211_parse(msg);
1555         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1556         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1557         struct nlattr *band, *freq;
1558
1559         *modes = 0;
1560
1561         if (attr[NL80211_ATTR_WIPHY_BANDS])
1562         {
1563                 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1564                 {
1565                         nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1566                                 nla_len(band), NULL);
1567
1568                         if (bands[NL80211_BAND_ATTR_HT_CAPA])
1569                                 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1570
1571                         /* Treat any nonzero capability as 11n */
1572                         if (caps > 0)
1573                                 *modes |= IWINFO_80211_N;
1574
1575                         nla_for_each_nested(freq,
1576                                 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1577                         {
1578                                 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1579                                         nla_data(freq), nla_len(freq), NULL);
1580
1581                                 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
1582                                         continue;
1583
1584                                 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
1585                                 {
1586                                         *modes |= IWINFO_80211_B;
1587                                         *modes |= IWINFO_80211_G;
1588                                 }
1589                                 else
1590                                 {
1591                                         *modes |= IWINFO_80211_A;
1592                                 }
1593                         }
1594                 }
1595         }
1596
1597         return NL_SKIP;
1598 }
1599
1600 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1601 {
1602         struct nl80211_msg_conveyor *req;
1603
1604         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1605         if (req)
1606         {
1607                 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
1608                 nl80211_free(req);
1609         }
1610
1611         return *buf ? 0 : -1;
1612 }
1613
1614 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1615 {
1616         /* Test whether we can create another interface */
1617         char *nif = nl80211_ifadd(ifname);
1618
1619         if (nif)
1620         {
1621                 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
1622
1623                 iwinfo_ifdown(nif);
1624                 nl80211_ifdel(nif);
1625
1626                 return 0;
1627         }
1628
1629         return -1;
1630 }