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->nl80211)
 563                         genl_family_put(nls->nl80211);
 564
 565                 if (nls->nl_sock)
 566                         nl_socket_free(nls->nl_sock);
 567
 568                 if (nls->nl_cache)
 569                         nl_cache_free(nls->nl_cache);
 570
 571                 free(nls);
 572                 nls = NULL;
 573         }
 574 }
 575
 576 int nl80211_get_mode(const char *ifname, char *buf)
 577 {
 578         return wext_get_mode(ifname, buf);
 579 }
 580
 581 int nl80211_get_ssid(const char *ifname, char *buf)
 582 {
 583         char *ssid;
 584
 585         if (!wext_get_ssid(ifname, buf))
 586         {
 587                 return 0;
 588         }
 589         else if( (ssid = nl80211_hostapd_info(ifname)) &&
 590                  (ssid = nl80211_getval(ifname, ssid, "ssid")) )
 591         {
 592                 memcpy(buf, ssid, strlen(ssid));
 593                 return 0;
 594         }
 595
 596         return -1;
 597 }
 598
 599 int nl80211_get_bssid(const char *ifname, char *buf)
 600 {
 601         char *bssid;
 602         unsigned char mac[6];
 603
 604         if (!wext_get_bssid(ifname, buf))
 605         {
 606                 return 0;
 607         }
 608         else if((bssid = nl80211_hostapd_info(ifname)) &&
 609                  (bssid = nl80211_getval(ifname, bssid, "bssid")))
 610         {
 611                 mac[0] = strtol(&bssid[0],  NULL, 16);
 612                 mac[1] = strtol(&bssid[3],  NULL, 16);
 613                 mac[2] = strtol(&bssid[6],  NULL, 16);
 614                 mac[3] = strtol(&bssid[9],  NULL, 16);
 615                 mac[4] = strtol(&bssid[12], NULL, 16);
 616                 mac[5] = strtol(&bssid[15], NULL, 16);
 617
 618                 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
 619                         mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 620
 621                 return 0;
 622         }
 623
 624         return -1;
 625 }
 626
 627 int nl80211_get_channel(const char *ifname, int *buf)
 628 {
 629         char *first;
 630
 631         if (!wext_get_channel(ifname, buf))
 632                 return 0;
 633
 634         else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
 635                 return wext_get_channel(first, buf);
 636
 637         return -1;
 638 }
 639
 640 int nl80211_get_frequency(const char *ifname, int *buf)
 641 {
 642         char *first;
 643
 644         if (!wext_get_frequency(ifname, buf))
 645                 return 0;
 646
 647         else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
 648                 return wext_get_frequency(first, buf);
 649
 650         return -1;
 651 }
 652
 653 int nl80211_get_txpower(const char *ifname, int *buf)
 654 {
 655         return wext_get_txpower(ifname, buf);
 656 }
 657
 658
 659 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
 660 {
 661         int8_t dbm;
 662         int16_t mbit;
 663         struct nl80211_rssi_rate *rr = arg;
 664         struct nlattr **attr = nl80211_parse(msg);
 665         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
 666         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
 667
 668         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 669                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
 670                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
 671                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
 672                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
 673                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
 674                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
 675                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
 676                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
 677                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
 678                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
 679         };
 680
 681         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
 682                 [NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
 683                 [NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
 684                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
 685                 [NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
 686         };
 687
 688         if (attr[NL80211_ATTR_STA_INFO])
 689         {
 690                 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
 691                                 attr[NL80211_ATTR_STA_INFO], stats_policy) )
 692                 {
 693                         if (sinfo[NL80211_STA_INFO_SIGNAL])
 694                         {
 695                                 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
 696                                 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
 697                         }
 698
 699                         if (sinfo[NL80211_STA_INFO_TX_BITRATE])
 700                         {
 701                                 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
 702                                                 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
 703                                 {
 704                                         if (rinfo[NL80211_RATE_INFO_BITRATE])
 705                                         {
 706                                                 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
 707                                                 rr->rate = rr->rate
 708                                                         ? (int16_t)((rr->rate + mbit) / 2) : mbit;
 709                                         }
 710                                 }
 711                         }
 712                 }
 713         }
 714
 715         return NL_SKIP;
 716 }
 717
 718 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
 719 {
 720         DIR *d;
 721         struct dirent *de;
 722         struct nl80211_msg_conveyor *req;
 723
 724         r->rssi = 0;
 725         r->rate = 0;
 726
 727         if ((d = opendir("/sys/class/net")) != NULL)
 728         {
 729                 while ((de = readdir(d)) != NULL)
 730                 {
 731                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
 732                                 (!de->d_name[strlen(ifname)] ||
 733                                  !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
 734                         {
 735                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
 736                                                                   NLM_F_DUMP);
 737
 738                                 if (req)
 739                                 {
 740                                         nl80211_send(req, nl80211_fill_signal_cb, r);
 741                                         nl80211_free(req);
 742                                 }
 743                         }
 744                 }
 745
 746                 closedir(d);
 747         }
 748 }
 749
 750 int nl80211_get_bitrate(const char *ifname, int *buf)
 751 {
 752         struct nl80211_rssi_rate rr;
 753
 754         if (!wext_get_bitrate(ifname, buf))
 755                 return 0;
 756
 757         nl80211_fill_signal(ifname, &rr);
 758
 759         if (rr.rate)
 760         {
 761                 *buf = (rr.rate * 100);
 762                 return 0;
 763         }
 764
 765         return -1;
 766 }
 767
 768 int nl80211_get_signal(const char *ifname, int *buf)
 769 {
 770         struct nl80211_rssi_rate rr;
 771
 772         if (!wext_get_signal(ifname, buf))
 773                 return 0;
 774
 775         nl80211_fill_signal(ifname, &rr);
 776
 777         if (rr.rssi)
 778         {
 779                 *buf = rr.rssi;
 780                 return 0;
 781         }
 782
 783         return -1;
 784 }
 785
 786 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
 787 {
 788         int8_t *noise = arg;
 789         struct nlattr **tb = nl80211_parse(msg);
 790         struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
 791
 792         static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
 793                 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
 794                 [NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
 795         };
 796
 797         if (!tb[NL80211_ATTR_SURVEY_INFO])
 798                 return NL_SKIP;
 799
 800         if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
 801                                                  tb[NL80211_ATTR_SURVEY_INFO], sp))
 802                 return NL_SKIP;
 803
 804         if (!si[NL80211_SURVEY_INFO_NOISE])
 805                 return NL_SKIP;
 806
 807         if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
 808                 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
 809
 810         return NL_SKIP;
 811 }
 812
 813
 814 int nl80211_get_noise(const char *ifname, int *buf)
 815 {
 816         int8_t noise;
 817         struct nl80211_msg_conveyor *req;
 818
 819         req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
 820         if (req)
 821         {
 822                 noise = 0;
 823
 824                 nl80211_send(req, nl80211_get_noise_cb, &noise);
 825                 nl80211_free(req);
 826
 827                 if (noise)
 828                 {
 829                         *buf = noise;
 830                         return 0;
 831                 }
 832         }
 833
 834         return -1;
 835 }
 836
 837 int nl80211_get_quality(const char *ifname, int *buf)
 838 {
 839         int signal;
 840
 841         if (wext_get_quality(ifname, buf))
 842         {
 843                 *buf = 0;
 844
 845                 if (!nl80211_get_signal(ifname, &signal))
 846                 {
 847                         /* A positive signal level is usually just a quality
 848                          * value, pass through as-is */
 849                         if (signal >= 0)
 850                         {
 851                                 *buf = signal;
 852                         }
 853
 854                         /* The cfg80211 wext compat layer assumes a signal range
 855                          * of -110 dBm to -40 dBm, the quality value is derived
 856                          * by adding 110 to the signal level */
 857                         else
 858                         {
 859                                 if (signal < -110)
 860                                         signal = -110;
 861                                 else if (signal > -40)
 862                                         signal = -40;
 863
 864                                 *buf = (signal + 110);
 865                         }
 866                 }
 867         }
 868
 869         return 0;
 870 }
 871
 872 int nl80211_get_quality_max(const char *ifname, int *buf)
 873 {
 874         if (wext_get_quality_max(ifname, buf))
 875                 /* The cfg80211 wext compat layer assumes a maximum
 876                  * quality of 70 */
 877                 *buf = 70;
 878
 879         return 0;
 880 }
 881
 882 int nl80211_get_encryption(const char *ifname, char *buf)
 883 {
 884         int i;
 885         char k[9];
 886         char *val, *res;
 887         struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
 888
 889         /* WPA supplicant */
 890         if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
 891             (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
 892         {
 893                 /* WEP */
 894                 if (strstr(val, "WEP"))
 895                 {
 896                         if (strstr(val, "WEP-40"))
 897                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
 898
 899                         else if (strstr(val, "WEP-104"))
 900                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
 901
 902                         c->enabled       = 1;
 903                         c->group_ciphers = c->pair_ciphers;
 904
 905                         c->auth_suites |= IWINFO_KMGMT_NONE;
 906                         c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
 907                 }
 908
 909                 /* WPA */
 910                 else
 911                 {
 912                         if (strstr(val, "TKIP"))
 913                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
 914
 915                         else if (strstr(val, "CCMP"))
 916                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
 917
 918                         else if (strstr(val, "NONE"))
 919                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
 920
 921                         else if (strstr(val, "WEP-40"))
 922                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
 923
 924                         else if (strstr(val, "WEP-104"))
 925                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
 926
 927
 928                         if ((val = nl80211_getval(NULL, res, "group_cipher")))
 929                         {
 930                                 if (strstr(val, "TKIP"))
 931                                         c->group_ciphers |= IWINFO_CIPHER_TKIP;
 932
 933                                 else if (strstr(val, "CCMP"))
 934                                         c->group_ciphers |= IWINFO_CIPHER_CCMP;
 935
 936                                 else if (strstr(val, "NONE"))
 937                                         c->group_ciphers |= IWINFO_CIPHER_NONE;
 938
 939                                 else if (strstr(val, "WEP-40"))
 940                                         c->group_ciphers |= IWINFO_CIPHER_WEP40;
 941
 942                                 else if (strstr(val, "WEP-104"))
 943                                         c->group_ciphers |= IWINFO_CIPHER_WEP104;
 944                         }
 945
 946
 947                         if ((val = nl80211_getval(NULL, res, "key_mgmt")))
 948                         {
 949                                 if (strstr(val, "WPA2"))
 950                                         c->wpa_version = 2;
 951
 952                                 else if (strstr(val, "WPA"))
 953                                         c->wpa_version = 1;
 954
 955
 956                                 if (strstr(val, "PSK"))
 957                                         c->auth_suites |= IWINFO_KMGMT_PSK;
 958
 959                                 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
 960                                         c->auth_suites |= IWINFO_KMGMT_8021x;
 961
 962                                 else if (strstr(val, "NONE"))
 963                                         c->auth_suites |= IWINFO_KMGMT_NONE;
 964                         }
 965
 966                         c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
 967                 }
 968
 969                 return 0;
 970         }
 971
 972         /* Hostapd */
 973         else if ((res = nl80211_hostapd_info(ifname)))
 974         {
 975                 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
 976                         c->wpa_version = atoi(val);
 977
 978                 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
 979
 980                 if (!val || strstr(val, "PSK"))
 981                         c->auth_suites |= IWINFO_KMGMT_PSK;
 982
 983                 if (val && strstr(val, "EAP"))
 984                         c->auth_suites |= IWINFO_KMGMT_8021x;
 985
 986                 if (val && strstr(val, "NONE"))
 987                         c->auth_suites |= IWINFO_KMGMT_NONE;
 988
 989                 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
 990                 {
 991                         if (strstr(val, "TKIP"))
 992                                 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
 993
 994                         if (strstr(val, "CCMP"))
 995                                 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
 996
 997                         if (strstr(val, "NONE"))
 998                                 c->pair_ciphers |= IWINFO_CIPHER_NONE;
 999                 }
1000
1001                 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1002                 {
1003                         switch(atoi(val)) {
1004                                 case 1:
1005                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1006                                         break;
1007
1008                                 case 2:
1009                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1010                                         break;
1011
1012                                 case 3:
1013                                         c->auth_algs |= IWINFO_AUTH_OPEN;
1014                                         c->auth_algs |= IWINFO_AUTH_SHARED;
1015                                         break;
1016
1017                                 default:
1018                                         break;
1019                         }
1020
1021                         for( i = 0; i < 4; i++ )
1022                         {
1023                                 snprintf(k, sizeof(k), "wep_key%d", i);
1024
1025                                 if ((val = nl80211_getval(ifname, res, k)))
1026                                 {
1027                                         if ((strlen(val) == 5) || (strlen(val) == 10))
1028                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1029
1030                                         else if ((strlen(val) == 13) || (strlen(val) == 26))
1031                                                 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1032                                 }
1033                         }
1034                 }
1035
1036                 c->group_ciphers = c->pair_ciphers;
1037                 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1038
1039                 return 0;
1040         }
1041
1042         return -1;
1043 }
1044
1045
1046 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1047 {
1048         struct nl80211_array_buf *arr = arg;
1049         struct iwinfo_assoclist_entry *e = arr->buf;
1050         struct nlattr **attr = nl80211_parse(msg);
1051         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1052
1053         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1054                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
1055                 [NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
1056                 [NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
1057                 [NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
1058                 [NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
1059                 [NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
1060                 [NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
1061                 [NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
1062                 [NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
1063                 [NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
1064         };
1065
1066         /* advance to end of array */
1067         e += arr->count;
1068
1069         if (attr[NL80211_ATTR_MAC])
1070                 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1071
1072         if (attr[NL80211_ATTR_STA_INFO])
1073         {
1074                 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1075                                 attr[NL80211_ATTR_STA_INFO], stats_policy))
1076                 {
1077                         if (sinfo[NL80211_STA_INFO_SIGNAL])
1078                                 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1079                 }
1080         }
1081
1082         e->noise = 0; /* filled in by caller */
1083         arr->count++;
1084
1085         return NL_SKIP;
1086 }
1087
1088 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1089 {
1090         DIR *d;
1091         int i, noise = 0;
1092         struct dirent *de;
1093         struct nl80211_msg_conveyor *req;
1094         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1095         struct iwinfo_assoclist_entry *e;
1096
1097         if ((d = opendir("/sys/class/net")) != NULL)
1098         {
1099                 while ((de = readdir(d)) != NULL)
1100                 {
1101                         if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1102                                 (!de->d_name[strlen(ifname)] ||
1103                                  !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1104                         {
1105                                 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1106                                                                   NLM_F_DUMP);
1107
1108                                 if (req)
1109                                 {
1110                                         nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1111                                         nl80211_free(req);
1112                                 }
1113
1114                                 break;
1115                         }
1116                 }
1117
1118                 closedir(d);
1119
1120                 if (!nl80211_get_noise(ifname, &noise))
1121                         for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1122                                 e->noise = noise;
1123
1124                 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1125                 return 0;
1126         }
1127
1128         return -1;
1129 }
1130
1131 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1132 {
1133         int *dbm_max = arg;
1134         int ch_cur, ch_cmp, bands_remain, freqs_remain;
1135
1136         struct nlattr **attr = nl80211_parse(msg);
1137         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1138         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1139         struct nlattr *band, *freq;
1140
1141         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1142                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1143                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1144                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1145                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1146                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1147                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1148         };
1149
1150         ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1151         *dbm_max = -1;
1152
1153         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1154         {
1155                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1156                           nla_len(band), NULL);
1157
1158                 nla_for_each_nested(freq,
1159                         bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1160                 {
1161                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1162                                 nla_data(freq), nla_len(freq), freq_policy);
1163
1164                         ch_cmp = nl80211_freq2channel(
1165                                 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1166
1167                         if( (!ch_cur || (ch_cmp == ch_cur)) &&
1168                                 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1169                         {
1170                                 *dbm_max = (int)(0.01 * nla_get_u32(
1171                                         freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1172
1173                                 break;
1174                         }
1175                 }
1176         }
1177
1178         return NL_SKIP;
1179 }
1180
1181 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1182 {
1183         int ch_cur;
1184         int dbm_max = -1, dbm_cur, dbm_cnt;
1185         struct nl80211_msg_conveyor *req;
1186         struct iwinfo_txpwrlist_entry entry;
1187
1188         if (nl80211_get_channel(ifname, &ch_cur))
1189                 ch_cur = 0;
1190
1191         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1192         if (req)
1193         {
1194                 /* initialize the value pointer with channel for callback */
1195                 dbm_max = ch_cur;
1196
1197                 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1198                 nl80211_free(req);
1199         }
1200
1201         if (dbm_max > -1)
1202         {
1203                 for (dbm_cur = 0, dbm_cnt = 0;
1204                      dbm_cur < dbm_max;
1205                      dbm_cur++, dbm_cnt++)
1206                 {
1207                         entry.dbm = dbm_cur;
1208                         entry.mw  = iwinfo_dbm2mw(dbm_cur);
1209
1210                         memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1211                 }
1212
1213                 entry.dbm = dbm_max;
1214                 entry.mw  = iwinfo_dbm2mw(dbm_max);
1215
1216                 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1217                 dbm_cnt++;
1218
1219                 *len = dbm_cnt * sizeof(entry);
1220                 return 0;
1221         }
1222
1223         return -1;
1224 }
1225
1226 static void nl80211_get_scancrypto(const char *spec,
1227         struct iwinfo_crypto_entry *c)
1228 {
1229         if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1230         {
1231                 c->enabled = 1;
1232
1233                 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1234                         c->wpa_version = 3;
1235
1236                 else if (strstr(spec, "WPA2"))
1237                         c->wpa_version = 2;
1238
1239                 else if (strstr(spec, "WPA"))
1240                         c->wpa_version = 1;
1241
1242                 else if (strstr(spec, "WEP"))
1243                         c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1244
1245
1246                 if (strstr(spec, "PSK"))
1247                         c->auth_suites |= IWINFO_KMGMT_PSK;
1248
1249                 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1250                         c->auth_suites |= IWINFO_KMGMT_8021x;
1251
1252                 if (strstr(spec, "WPA-NONE"))
1253                         c->auth_suites |= IWINFO_KMGMT_NONE;
1254
1255
1256                 if (strstr(spec, "TKIP"))
1257                         c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1258
1259                 if (strstr(spec, "CCMP"))
1260                         c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1261
1262                 if (strstr(spec, "WEP-40"))
1263                         c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1264
1265                 if (strstr(spec, "WEP-104"))
1266                         c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1267
1268                 c->group_ciphers = c->pair_ciphers;
1269         }
1270         else
1271         {
1272                 c->enabled = 0;
1273         }
1274 }
1275
1276 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1277 {
1278         int freq, rssi, qmax, count;
1279         char *res;
1280         char ssid[128] = { 0 };
1281         char bssid[18] = { 0 };
1282         char cipher[256] = { 0 };
1283
1284         /* Got a radioX pseudo interface, find some interface on it or create one */
1285         if (!strncmp(ifname, "radio", 5))
1286         {
1287                 /* Reuse existing interface */
1288                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1289                 {
1290                         return nl80211_get_scanlist(res, buf, len);
1291                 }
1292
1293                 /* Need to spawn a temporary iface for scanning */
1294                 else if ((res = nl80211_ifadd(ifname)) != NULL)
1295                 {
1296                         count = nl80211_get_scanlist(res, buf, len);
1297                         nl80211_ifdel(res);
1298                         return count;
1299                 }
1300         }
1301
1302         struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1303
1304         /* WPA supplicant */
1305         if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1306         {
1307                 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1308                 {
1309                         nl80211_get_quality_max(ifname, &qmax);
1310
1311                         /* skip header line */
1312                         while( *res++ != '\n' );
1313
1314                         count = 0;
1315
1316                         while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1317                                       bssid, &freq, &rssi, cipher, ssid) > 0 )
1318                         {
1319                                 /* BSSID */
1320                                 e->mac[0] = strtol(&bssid[0],  NULL, 16);
1321                                 e->mac[1] = strtol(&bssid[3],  NULL, 16);
1322                                 e->mac[2] = strtol(&bssid[6],  NULL, 16);
1323                                 e->mac[3] = strtol(&bssid[9],  NULL, 16);
1324                                 e->mac[4] = strtol(&bssid[12], NULL, 16);
1325                                 e->mac[5] = strtol(&bssid[15], NULL, 16);
1326
1327                                 /* SSID */
1328                                 memcpy(e->ssid, ssid,
1329                                         min(strlen(ssid), sizeof(e->ssid) - 1));
1330
1331                                 /* Mode (assume master) */
1332                                 sprintf((char *)e->mode, "Master");
1333
1334                                 /* Channel */
1335                                 e->channel = nl80211_freq2channel(freq);
1336
1337                                 /* Signal */
1338                                 e->signal = rssi;
1339
1340                                 /* Quality */
1341                                 if (rssi < 0)
1342                                 {
1343                                         /* The cfg80211 wext compat layer assumes a signal range
1344                                          * of -110 dBm to -40 dBm, the quality value is derived
1345                                          * by adding 110 to the signal level */
1346                                         if (rssi < -110)
1347                                                 rssi = -110;
1348                                         else if (rssi > -40)
1349                                                 rssi = -40;
1350
1351                                         e->quality = (rssi + 110);
1352                                 }
1353                                 else
1354                                 {
1355                                         e->quality = rssi;
1356                                 }
1357
1358                                 /* Max. Quality */
1359                                 e->quality_max = qmax;
1360
1361                                 /* Crypto */
1362                                 nl80211_get_scancrypto(cipher, &e->crypto);
1363
1364                                 /* advance to next line */
1365                                 while( *res && *res++ != '\n' );
1366
1367                                 count++;
1368                                 e++;
1369
1370                                 memset(ssid, 0, sizeof(ssid));
1371                                 memset(bssid, 0, sizeof(bssid));
1372                                 memset(cipher, 0, sizeof(cipher));
1373                         }
1374
1375                         *len = count * sizeof(struct iwinfo_scanlist_entry);
1376                         return 0;
1377                 }
1378         }
1379
1380         /* AP scan */
1381         else
1382         {
1383                 /* Got a temp interface, don't create yet another one */
1384                 if (!strncmp(ifname, "tmp.", 4))
1385                 {
1386                         if (!iwinfo_ifup(ifname))
1387                                 return -1;
1388
1389                         wext_get_scanlist(ifname, buf, len);
1390                         iwinfo_ifdown(ifname);
1391                         return 0;
1392                 }
1393
1394                 /* Spawn a new scan interface */
1395                 else
1396                 {
1397                         if (!(res = nl80211_ifadd(ifname)))
1398                                 goto out;
1399
1400                         if (!iwinfo_ifmac(res))
1401                                 goto out;
1402
1403                         /* if we can take the new interface up, the driver supports an
1404                          * additional interface and there's no need to tear down the ap */
1405                         if (iwinfo_ifup(res))
1406                         {
1407                                 wext_get_scanlist(res, buf, len);
1408                                 iwinfo_ifdown(res);
1409                         }
1410
1411                         /* driver cannot create secondary interface, take down ap
1412                          * during scan */
1413                         else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1414                         {
1415                                 wext_get_scanlist(res, buf, len);
1416                                 iwinfo_ifdown(res);
1417                                 iwinfo_ifup(ifname);
1418                                 nl80211_hostapd_hup(ifname);
1419                         }
1420
1421                 out:
1422                         nl80211_ifdel(res);
1423                         return 0;
1424                 }
1425         }
1426
1427         return -1;
1428 }
1429
1430 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1431 {
1432         int bands_remain, freqs_remain;
1433
1434         struct nl80211_array_buf *arr = arg;
1435         struct iwinfo_freqlist_entry *e = arr->buf;
1436
1437         struct nlattr **attr = nl80211_parse(msg);
1438         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1439         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1440         struct nlattr *band, *freq;
1441
1442         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1443                 [NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
1444                 [NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
1445                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1446                 [NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
1447                 [NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
1448                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
1449         };
1450
1451         nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1452         {
1453                 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1454                         nla_len(band), NULL);
1455
1456                 nla_for_each_nested(freq,
1457                         bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1458                 {
1459                         nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1460                                 nla_data(freq), nla_len(freq), NULL);
1461
1462                         if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1463                                 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1464                                 continue;
1465
1466                         e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1467                         e->channel = nl80211_freq2channel(e->mhz);
1468
1469                         e->restricted = (
1470                                 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1471                                 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS]      ||
1472                                 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1473                         ) ? 1 : 0;
1474
1475                         e++;
1476                         arr->count++;
1477                 }
1478         }
1479
1480         return NL_SKIP;
1481 }
1482
1483 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1484 {
1485         struct nl80211_msg_conveyor *req;
1486         struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1487
1488         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1489         if (req)
1490         {
1491                 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
1492                 nl80211_free(req);
1493         }
1494
1495         if (arr.count > 0)
1496         {
1497                 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
1498                 return 0;
1499         }
1500
1501         return -1;
1502 }
1503
1504 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
1505 {
1506         char *buf = arg;
1507         struct nlattr **attr = nl80211_parse(msg);
1508
1509         if (attr[NL80211_ATTR_REG_ALPHA2])
1510                 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
1511         else
1512                 buf[0] = 0;
1513
1514         return NL_SKIP;
1515 }
1516
1517 int nl80211_get_country(const char *ifname, char *buf)
1518 {
1519         int rv = -1;
1520         struct nl80211_msg_conveyor *req;
1521
1522         req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1523         if (req)
1524         {
1525                 nl80211_send(req, nl80211_get_country_cb, buf);
1526                 nl80211_free(req);
1527
1528                 if (buf[0])
1529                         rv = 0;
1530         }
1531
1532         return rv;
1533 }
1534
1535 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1536 {
1537         int i, count;
1538         struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1539         const struct iwinfo_iso3166_label *l;
1540
1541         for( l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++ )
1542         {
1543                 e->iso3166 = l->iso3166;
1544                 e->ccode[0] = (l->iso3166 / 256);
1545                 e->ccode[1] = (l->iso3166 % 256);
1546         }
1547
1548         *len = (count * sizeof(struct iwinfo_country_entry));
1549         return 0;
1550 }
1551
1552 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
1553 {
1554         int *modes = arg;
1555         int bands_remain, freqs_remain;
1556         uint16_t caps = 0;
1557         struct nlattr **attr = nl80211_parse(msg);
1558         struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1559         struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1560         struct nlattr *band, *freq;
1561
1562         *modes = 0;
1563
1564         if (attr[NL80211_ATTR_WIPHY_BANDS])
1565         {
1566                 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1567                 {
1568                         nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1569                                 nla_len(band), NULL);
1570
1571                         if (bands[NL80211_BAND_ATTR_HT_CAPA])
1572                                 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1573
1574                         /* Treat any nonzero capability as 11n */
1575                         if (caps > 0)
1576                                 *modes |= IWINFO_80211_N;
1577
1578                         nla_for_each_nested(freq,
1579                                 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1580                         {
1581                                 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1582                                         nla_data(freq), nla_len(freq), NULL);
1583
1584                                 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
1585                                         continue;
1586
1587                                 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
1588                                 {
1589                                         *modes |= IWINFO_80211_B;
1590                                         *modes |= IWINFO_80211_G;
1591                                 }
1592                                 else
1593                                 {
1594                                         *modes |= IWINFO_80211_A;
1595                                 }
1596                         }
1597                 }
1598         }
1599
1600         return NL_SKIP;
1601 }
1602
1603 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1604 {
1605         struct nl80211_msg_conveyor *req;
1606
1607         req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1608         if (req)
1609         {
1610                 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
1611                 nl80211_free(req);
1612         }
1613
1614         return *buf ? 0 : -1;
1615 }
1616
1617 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1618 {
1619         /* Test whether we can create another interface */
1620         char *nif = nl80211_ifadd(ifname);
1621
1622         if (nif)
1623         {
1624                 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
1625
1626                 iwinfo_ifdown(nif);
1627                 nl80211_ifdel(nif);
1628
1629                 return 0;
1630         }
1631
1632         return -1;
1633 }
1634
1635 int nl80211_get_hardware_id(const char *ifname, char *buf)
1636 {
1637         int rv;
1638         char *res;
1639
1640         /* Got a radioX pseudo interface, find some interface on it or create one */
1641         if (!strncmp(ifname, "radio", 5))
1642         {
1643                 /* Reuse existing interface */
1644                 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1645                 {
1646                         return wext_get_hardware_id(res, buf);
1647                 }
1648
1649                 /* Need to spawn a temporary iface for finding IDs */
1650                 else if ((res = nl80211_ifadd(ifname)) != NULL)
1651                 {
1652                         rv = wext_get_hardware_id(res, buf);
1653                         nl80211_ifdel(res);
1654                         return rv;
1655                 }
1656         }
1657
1658         return wext_get_hardware_id(ifname, buf);
1659 }
1660
1661 static const struct iwinfo_hardware_entry *
1662 nl80211_get_hardware_entry(const char *ifname)
1663 {
1664         struct iwinfo_hardware_id id;
1665
1666         if (nl80211_get_hardware_id(ifname, (char *)&id))
1667                 return NULL;
1668
1669         return iwinfo_hardware(&id);
1670 }
1671
1672 int nl80211_get_hardware_name(const char *ifname, char *buf)
1673 {
1674         const struct iwinfo_hardware_entry *hw;
1675
1676         if (!(hw = nl80211_get_hardware_entry(ifname)))
1677                 sprintf(buf, "Generic MAC80211");
1678         else
1679                 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
1680
1681         return 0;
1682 }
1683
1684 int nl80211_get_txpower_offset(const char *ifname, int *buf)
1685 {
1686         const struct iwinfo_hardware_entry *hw;
1687
1688         if (!(hw = nl80211_get_hardware_entry(ifname)))
1689                 return -1;
1690
1691         *buf = hw->txpower_offset;
1692         return 0;
1693 }
1694
1695 int nl80211_get_frequency_offset(const char *ifname, int *buf)
1696 {
1697         const struct iwinfo_hardware_entry *hw;
1698
1699         if (!(hw = nl80211_get_hardware_entry(ifname)))
1700                 return -1;
1701
1702         *buf = hw->frequency_offset;
1703         return 0;
1704 }